Declare A New Dictionary in Function Calls Using C#
Introduction
There are times that you want to create a quick dictionary on the fly so that the reference isn't held in memory but is processed quickly by a function. A C# dictionary can be created and passed to a function and it wouldn't be retained in memory unless the function itself saves the dictionary in memory. Several syntaxes can accommodate this let's look at the first.
Collection Initializer
This syntax has each key-value pair in curly braces with the new dictionary and the types assigned for keys and values.
Collection Initializer Example Code
This creates a temporary dictionary and passes it to the function print values where the dictionary is printed to the screen.
PrintValues(new Dictionary<string, int>
{
{"Sunny", 30},
{"Cloudy", 20},
{"Rainy", 15},
{"Snowy", -5},
{"Foggy", 10}
});//create a dictionary by a collection initializer
void PrintValues(Dictionary<string, int> dictionary)
{
int count = 1;
foreach (KeyValuePair<string, int> entry in dictionary)//loop through dictionary
{
Console.WriteLine($"{count++}. key:{entry.Key}, value:{entry.Value}");//Print screen
}
}
Code Output
1. key:Sunny, value:30
2. key:Cloudy, value:20
3. key:Rainy, value:15
4. key:Snowy, value:-5
5. key:Foggy, value:10
As expected, the key and values show correctly here. Even when the dictionary is not assigned to a variable.
Collection Initializer Test
This test passes 50 key-value pairs dictionary to a test function. This function is called 10 million times to get the average speed over 10 tests.
Test Parameters
| Test Parameters | Total |
|---|---|
| Tests | 10 |
| Function Calls Per Test | 10 million |
Collection Initializer Test Code
TestMethod(new Dictionary<string, string>()
{
{"^mwi{c$wS_1XhcIMCDTTjgcz.TQ5mrB8U96GfIc6LH6NHD#02)", "d[,3GS;&b{.VGVM?Je+y[%d2-^}g?{w9CpuYL?$j76jmE:i'8k"},
{"1<={{SoG8kX_d;wroOD:S%j#6:CL,:Pzj&%({#uy7LA'ac4G.r", "y6j['^&2UE]g4lNkd$7Z*M*%.?+mX1S(zTK><ZV:&9Tzj1$47_"},
{"i=QIez<x7J{%VQ$CNx^08hy^e]c'H9BV@2)E)dc7#j^r$ITE+Y", "1xiN@AJM=[G]VIsbF^F+.b*LhKKs6N-,>=)::IO,cMpNsH'K#C"},
{"O4,SEkg'7{5PrLNb#p-JzN0$%0jnYgIsFrfTS^h6NMi.L[L1BP", "W%d]B8s=yvdd.}j863[IbKYSlJ03T*lf%(Ff$r50Si,+ywKkU#"},
{"_#(=cY44dl=fZVc*F'$mx80C,i$)#Ng3Ta?5uN$@wM#;,LD+)_", "5#2)eS<j7tZ}u]DIqGXS<RI_YB!m5jK!<uTV934;Z?IlM+]<(e"},
{"82=(Nuu}mv>y$(;k]LYE*x(10!X2sJ$F.h=k)q+:t2X0<9ivgk", "S@27<@.3}H6DO7ckZ?<OsWk5}pQr@LaM0>pD4+1(-a8YlK]RfK"},
{"alF?b1KR(h66Ayx.9T;EO&O<^h9isgl51=Lt4)*_Nzb@,OA,Dn", "<Wa>Wk5,4KY8%7;F6R++C47l]wSs:<L]E^3Kd{[R_,U7<_&a5A"},
//...more entries
});
Code Output
Test 1:Function Calls:10000000, In 0m 12s 204ms
Test 2:Function Calls:10000000, In 0m 12s 353ms
Test 3:Function Calls:10000000, In 0m 12s 33ms
Test 4:Function Calls:10000000, In 0m 12s 194ms
Test 5:Function Calls:10000000, In 0m 12s 118ms
Test 6:Function Calls:10000000, In 0m 11s 958ms
Test 7:Function Calls:10000000, In 0m 12s 42ms
Test 8:Function Calls:10000000, In 0m 11s 890ms
Test 9:Function Calls:10000000, In 0m 12s 4ms
Test 10:Function Calls:10000000, In 0m 12s 66ms
Collection Initlizer Average Speed:12087ms, In 10 Tests
This is the baseline test of about 12 seconds. I will investigate how the other initializers perform.
Full Collection Initializer Test Code
List<double> testSpeedList = new List<double>();
for (int testIndex = 0; testIndex < numberOfTests; testIndex++)
{
testSpeedList.Add(StartTest(testIndex));
}
Console.WriteLine($"{testName} Average Speed:{Math.Round(testSpeedList.Average())}ms, In {numberOfTests} Tests");
double StartTest(int testIndex)
{
Stopwatch stopwatch = new Stopwatch();
for (int i = 0; i < numberOfFunctionCalls; i++)
{
stopwatch.Start();//Start the Stopwatch timer
TestMethod(new Dictionary<string, string>()
{
{"^mwi{c$wS_1XhcIMCDTTjgcz.TQ5mrB8U96GfIc6LH6NHD#02)", "d[,3GS;&b{.VGVM?Je+y[%d2-^}g?{w9CpuYL?$j76jmE:i'8k"},
{"1<={{SoG8kX_d;wroOD:S%j#6:CL,:Pzj&%({#uy7LA'ac4G.r", "y6j['^&2UE]g4lNkd$7Z*M*%.?+mX1S(zTK><ZV:&9Tzj1$47_"},
{"i=QIez<x7J{%VQ$CNx^08hy^e]c'H9BV@2)E)dc7#j^r$ITE+Y", "1xiN@AJM=[G]VIsbF^F+.b*LhKKs6N-,>=)::IO,cMpNsH'K#C"},
{"O4,SEkg'7{5PrLNb#p-JzN0$%0jnYgIsFrfTS^h6NMi.L[L1BP", "W%d]B8s=yvdd.}j863[IbKYSlJ03T*lf%(Ff$r50Si,+ywKkU#"},
{"_#(=cY44dl=fZVc*F'$mx80C,i$)#Ng3Ta?5uN$@wM#;,LD+)_", "5#2)eS<j7tZ}u]DIqGXS<RI_YB!m5jK!<uTV934;Z?IlM+]<(e"},
{"82=(Nuu}mv>y$(;k]LYE*x(10!X2sJ$F.h=k)q+:t2X0<9ivgk", "S@27<@.3}H6DO7ckZ?<OsWk5}pQr@LaM0>pD4+1(-a8YlK]RfK"},
{"alF?b1KR(h66Ayx.9T;EO&O<^h9isgl51=Lt4)*_Nzb@,OA,Dn", "<Wa>Wk5,4KY8%7;F6R++C47l]wSs:<L]E^3Kd{[R_,U7<_&a5A"},
{"q%JK{Zq+m%9s%+-!^4m!y?*>p.gEOdL>cNNeYqDz(-O4QDN)<N", "GrWlFqA$1#CoGif<;&$q6Ie;[aNuLL^*Cm*>E>0kRhZ>,GD^a?"},
{"73da,<GdSKmD')8@=^}&%Sd,VwVyX-AXo-HeEIJPK@nceV!.0j", "-@!>_[!IZ'w%O)jU;P}dzGmID3i[638p:>:kvGqf%&4Cuup>w="},
{"!x{PgAt8spm[xphH{4PF(n[e#V{&f7>;+pRkts(1GVXRz>,txb", "tD{3>:NF5Ka{mYtKd^eFd<XRclC*.7uXwabofyl%5#BAOs]i0)"},
{"U>0$WA2KdlbdU?_CeRn]Es}_HtF{C;-z>bg;yl,p(ZQVK@Lsd.", "N)GP2E}x6rww5M54j8EYtczi,.oqH=y()5_c?8*v'fP'=<Y0;w"},
{"d{LB-Gj;FFwL!:wM;O6e8eEmyvj6pDB17=V,4!C0o}?rcJJ>*=", "fCRe0LhH@0KKPniDF!3$=&<lWrIRR0$g4i:xL>?C}sYwaO#.!1"},
{";$'dzFgw#zaIl&P%W}<a1K&?uF(_ly+#m=9PW:j6?S2$WzKOC[", "=tRkpNPP1g,muw#>P-3=e)X#d!W,x$t!yH^,MTfiXd71<'&P)c"},
{"KwpK9g(g?YmXGIRZ+KIj+'[c]N;Bk+n;tYkltIc3YVbKyy2AVK", "OV3&We2Q?$159Q>5aX$H2r^gp{[i#ebH:,9QU=],Kwv<x+B:@,"},
{"zb0O_@D[tuzc]q9Li9u@UuhC+[w+vU0:(IPNF9Ng)FV1tf5kd6", "<_3e}r3K>C6khwvW;DS6&J%#@Q'r,ytaDBC{y%gk9ePPH9?B}h"},
{"$L-pRq<a$j?P)s_eJat[{CQ,oxS:^<*8U4_8noNWMPLWAJmU#:", "U@[2SWSK@w0>(a:(*+3j8;?jam5qhHztkCE:xNOr6}_ApI%SvW"},
{"yMu)bW4$,%k6E#geI0NjO)c{m61;$neqs2_9$;<VUYu!]Zr8>4", "De{r5se8V:R^LKY4PC,70e3rXP0M@d39XF,TyrG<^-j0PBpf!&"},
{"Bq9!)}%-h%WFh<k<HQIH:X-rv=s;EDJ,WOCAix{Sg@#?l<w0Yg", "cG(I>V{0;yr!,]kkIa@_;Pl*-8m5n=Z(+f$I'SOu:tH>1ky3hd"},
{"T(EI&)sqbAJF_4Zi_eEPK=3:bH9XFMsSZ<!JYbc6:b.iuCB$-9", "1d*>=>bs(-e7A=SWbJn1UA9tOK?R6m^ikLkAtTeUHE0[_Z%6jR"},
{"v>xPu+Mc&%dd<hpDnoU}f8CAC=CX[Ru>[}BO_q<xu:KB{gB.:a", "gM$EfdEVSK_Ielmi2sdc=;zuj?[BgtVO,6x(x[dTCy'iWT4VQS"},
{"pIA5k}OMM&'y1X?1,up[jzmpRaTj%rsJP.';s(+&9D>M?,$4B=", "cCRM8,zL;<x2OFpgP-HNZFvH8grL^}1!fH}{v<Vc?)wBn&O%^'"},
{"#B'LRp+CpwazcE3Ezk7GN4VBOGZ4oFV?VH*8^TCba4i7DAm'51", "H[s97$K7Q5Mw31'x:d*0>D!-n#Q(cJ(dA%c>({kGUKk[}9^Zq$"},
{"q_Igf!AeCL.O5_xyz3ZjKV.OtXSvkr[VBTGu!(HDt!0&kEV'G4", "cp:=2uinVn]p6p6h}PFr@zojB:zziaD?2@0Fngd<]9OfNXP_'b"},
{"st8'b='jY*BKcUi7[OSJ#1}FLPEmsXnm^E*2cxK1MlpQ4B7=5?", "2FAOp)jgw,nr{BqOMtzrd+#%<DCczlvILY(n;*ESrLn]J$i1i<"},
{"v]Z.g9^8UFp:bUG;Rh5=2UUk{+GV[buN7!rnOHLzbJT;wraDP<", "n*hbL2U[D){7u{t>';}KmUubvDo4)L+jGhU'jP[<=]>t-(wd}m"},
{"5u8j$2%Iz;?V87gKzfduoSAf>NByolTohUzcP0^U56d%t&1By}", "++6nll'HEKt&x;EF}1^)M.VtFgO;h_O&g[1zfGL*.rF,NC1+X>"},
{"?rLQS<R'=@ec29q'w3l^uvv-H+Z+(2]i7rW-&v--}0m{)tWPF'", "<vLU;jPZ%$cE4tuZbLhSkEC+6}nqBs?1$Ze]'@gTwIpPF:UPW9"},
{"p<hb)gN.?w}P1nQEP%67^d3O{&k$=qzYVRWMpPRwQ6GkC>fyWT", "I*KE?JRmFxe%s+w=}Xj_^%GADh@mvHE}P?&8X+>K=Mwar9z{4C"},
{"LfV,%l=i<z5>T4X4o4rL8C9GJ^II&})ea(mdvVcv$KbNgPK*!g", "7dsj;=es>L65#UnxnOkr,IBwe0sw;{Uf=N_gMf@77xnN%6j-II"},
{"3kC(g_&JDABQBMc#hCMqzL'=Oy-yqU$=GMO2j5fesC)>_[AY!v", "MC;.q2A{vxNlp:Mh@7Xhf&ef5o.d)iPvLBzXpf<CzmW@CoxUt?"},
{"{Q07BE0eIP{'(Wy7+6{GW!_I+w(bf}hJ9h#ZA+Hcf4z,qUcoz$", "gKOoN@LGDHlQHiHR@CVYkI!d?nF>?x.JUf.xYJLqRdzp$J.l+1"},
{"=ZnvxDEm{G9nkOHo#@Mb-V%icQ3tD_uPM{TgOyeP^f#S2u&p1a", "P=;$n)tA?Tuo.?y}M&LvHk+<;E.4j:ZW'X<bkoJ[:<kJqYGvl8"},
{"[x.(6d}?M{mD5mPNuCZI7TDnZO{fmj99':cd>CQ3T4RV_SL'-j", "KCPCv^Jae76$a{1hgVf$Y^b(See'm=[D!(pX5[ZZTUq<V_NBeb"},
{"!Ao6jp(%$cG.zx&8:)p@{O+WxB=[h6E*i:bWsOQKaM0uY]i{rn", "@aMWX*5%r[&;Y0vx!Rw{aK+p$HnoHammU'6-'$F4[#x4E%*9XS"},
{"hm7z61B0'[ygwbl0;RS@=aNN1T#QKyYo1mw,Ch:p=&RgnQ2f9e", "QW#T1x>.uk>&qJi^!nT9OL;c,[.T)y!<HsMkn^LB{82_Zx_VFv"},
{"x-vy}OM4[$$cM8hmiIhjSLf^Nhral;,2L6m6*?DO#F!QwN^Z-3", "l6k,5VDgo0q-1umr#&]+uFD0t&75*MEDL{.1}yS.[s;BaEX8i$"},
{"m%b1KXfWMqh6{X!N;*c,T@Fc%.roF9XE*@C760j3]XkzYB.8f-", "[(aEzDf0'9zEWeUC2w@2){8zx<uU<1o*n+t6tAg9uT;Cy?p.<,"},
{"Nia5K.iCp;R3;M_'Tmi]7EHR'0):CH0.h)Q-cQc@0CeFjfDwgP", "Bb(5YaqG_^{8ha09SNt$^8HM2]hJxT!qPCrR'}l*V@<c]C4cs:"},
{"b#}-Gdtl@t=HJLIMTtEVC8j_s<a98A4^vPP<DxY)jhlRl'-t(X", "wOi.q1+XWJFNNERE26KKA3''3%LDNC]uJq.#BPntp0N]LorFx$"},
{"}nZ-Q)iCCcPKyD?{h[fh{brT$evc<nP4#bn5oyFW=l}sVpd)A3", "I};}'=r;b;Ezn@7Mk_wE^vbmEg$sxz.tR1D.^RQ#@u>&61W8[N"},
{"b?;u]sr*7{DlgskM'ZfI,!QNfnj,#'*n+,iaQ<gg2Gum:C'&Vt", "vzhkIj(c2wiNbJt5GS$^f*!)Ht{&+RCE]1'.Z1?)e%U5f%kh#@"},
{"e.sN#7XCKx*U)vh:VW'^@D'fc,XskH-4&-8z5f-V&b:8>zCi@8", "y!9*#)l?VhnN_H.,Zu,8c.;3o{ABP*4ezDt#0U-[vRs0kE#ONW"},
{"l>wF#FqVvh#e1r;J(I<'9@XM[nesE]{Qw^!>;G>_hlG]JN'2p}", "3v+tsIZ{p]@V%mO4k>!m5tAyOq+(XVn^s(kC]j63dwWCR:3-%,"},
{"kjTq{%J9H2fWz2r_}*xK+H=@nKAbPyt4Qd2{r!^a[t&@X5Q_O{", ">bG2AVisGknODJW!*)5lo,UG+*KdP8PQI*z,:4iW}J.1Ejmbx9"},
{"6'+Rhjoi+Sf{EU:!R,Ygjad'sNu:n?fy8yD!GNZ+I4xJy<vl7<", "VU1[*ACD+:fD0oQ2H5uav9NP{{R'ojqZCtl5HD18zHWQbVdMPB"},
{"Sw'WF>(Cv%1q_5@EIC;)#^-1g>T>AbQ29J-eoTsPoHSGKs'm#Z", "v2dBoC51<aQw&9K0s2_ZE9xdtd+0GhTXlksmD!0FZj1H:Y^UO)"},
{"+p-]Z@-z=jNeuzXVea!6[]8;KzOmp1;gGj:+50Wi<X'P_CY5a0", "JoWGYOX09U2@;RH!zV+vF#Tg'L,xZ5L<Z%iT59y45cA7X]2+}'"},
{"pmq+1K5=A>#58!$hgAGCZH&g15yV8F22u.O(QTiJ9k0gIIrNgT", "3WF#hLGk2V@}V77LlM0fy7vo!Tujt9RK&&O%DL,i9$JIlSJ3Y&"},
{"06@C2Jc:YBAN)gVVLN-}PH}%b)29e4!1t['^5:,3!Ev_7CjBfe", "]ORr2%CpVXz4bU*Q5%aRB?PgTR486jR5@'kw)F;crsn'gPQ7I,"},
{"1ZMXpF>R8I>{j'0]&60UO)KX-+FZiGRa:8j&v#ZIqac$rB41Q5", "+4HA4+aBgG}+=]e@<2F8DzZZi{ZPS1?}9[m+D%Z%2+W=.ZDIRQ"}
});
stopwatch.Stop();//Stop the Stopwatch timer
}
stopwatch.Stop();//Stop the Stopwatch timer
Console.WriteLine($"Test {testIndex + 1}:Function Calls:{numberOfFunctionCalls}, In {stopwatch.Elapsed.Minutes}m {stopwatch.Elapsed.Seconds}s {stopwatch.Elapsed.Milliseconds}ms");
return stopwatch.Elapsed.TotalMilliseconds;
}
Index Initializer
Index initializer was introduced in C# 6.0 The syntax is easier to read than the curly-braced version.
Index Initializer Example Code
This example shows the index initializer syntax in the function. It follows closely how its dictionary indexer is used outside of initialization.
PrintValues(new Dictionary<string, int>
{
["Elephant"] = 70,
["Giant tortoise"] = 150,
["Bowhead whale"] = 200,
["Naked mole-rat"] = 30,
["Blue whale"] = 100,
["Human"] = 120
});//create a dictionary by Index initializer
void PrintValues(Dictionary<string, int> dictionary)
{
int count = 1;
foreach (KeyValuePair<string, int> entry in dictionary)//loop through dictionary
{
Console.WriteLine($"{count++}. key:{entry.Key}, value:{entry.Value}");//Print screen
}
}
Code Output
1. key:Elephant, value:70
2. key:Giant tortoise, value:150
3. key:Bowhead whale, value:200
4. key:Naked mole-rat, value:30
5. key:Blue whale, value:100
6. key:Human, value:120
Index Intializer Speed Test
This is the same test as before except the syntax is changed for the index initializer. Below are the test parameters.
Test Parameters
| Test Parameters | Total |
|---|---|
| Tests | 10 |
| Function Calls Per Test | 10 million |
Index Intializer Speed Test Code
TestMethod(new Dictionary<string, string>()
{
["n0WY!<^[uOBgv90IkKr.32k^766c8>JCV&h%Sd#<Dc5FLmDvs}"] = "]RLt+;DG[wNbFQcv;ID9PYW-tWF]Fxtkr%>UL-mxvUIgL{?;AN",
["<;pl)K1-?K3A(5H8cjGTFGz%1>P:%sanS56M!W0!,(vof[?OdH"] = "(24wMS$On[Ext0]QQaL=m&Fg16^!wiut[{Db-*&7ZCo,*ERMf}",
["%oHM%?nIdZQAjKgQJEUszymyFMm'9N)29;n(=pVo=>r#)(otdo"] = "?^,Je<v1;eXV-baosiy04YN=vr41*akMnIEb,PHS}kfA4*BQ[G",
[":%l;wG!x)=x=<cH)XkTooD%Jlct]R,YnOD<+o>%V*xGttH-3Dw"] = "kdj8^*H;xpCI[P:Yh%ndZoQhCmTOaxPnGtG)%w9Nt5umMei2+l",
["FNwO!wLG:A{CFL>{[o={kI'Aj,H'P[q)}q>bpR4E,K1kaUE}sG"] = "1'4v,E;=(Dho5ufs0$OxBVabX%Q_6)ULOF<>G!mkec[rv;cC<=",
["2B[zj:T%AuveNj>fz;fit6ID_6dHj<gs7:0_8F#,_oA&14i3Iz"] = "8!ZL-uJHNY?5&@iNy8+R{ppD7<uFlaCjSwbRzn$CtW@Ux;>aGD",
["*zWMqT<=+dB[ZbmX}YJyrV.V'wx*=pgtaiD@@ij2wo*_QpGtBw"] = "#F#{w^T:!&fTtPV+=mj[s^K_fn8u]yAK}^XL.s9NwTGm#=[!Hn",
//... more entries
});
Code Output
Test 1:Function Calls:10000000, In 0m 12s 225ms
Test 2:Function Calls:10000000, In 0m 11s 968ms
Test 3:Function Calls:10000000, In 0m 11s 694ms
Test 4:Function Calls:10000000, In 0m 11s 645ms
Test 5:Function Calls:10000000, In 0m 11s 711ms
Test 6:Function Calls:10000000, In 0m 11s 927ms
Test 7:Function Calls:10000000, In 0m 11s 788ms
Test 8:Function Calls:10000000, In 0m 11s 678ms
Test 9:Function Calls:10000000, In 0m 11s 650ms
Test 10:Function Calls:10000000, In 0m 11s 947ms
Index Initlizer Average Speed:11824ms, In 10 Tests
We see a slight performance improvement even though it is small.
Full Index Intializer Speed Test Code
using System.Diagnostics;
int numberOfTests = 10;//Number of tests
int numberOfFunctionCalls = 10000000;//Number of function calls made per test
string testName = "Index Initlizer";//Test name to print to average
List<string> keysList = new List<string>();
Dictionary<string, string> TestMethod(Dictionary<string, string> dictionary)
{
return dictionary;
}
List<double> testSpeedList = new List<double>();
for (int testIndex = 0; testIndex < numberOfTests; testIndex++)
{
testSpeedList.Add(StartTest(testIndex));
}
Console.WriteLine($"{testName} Average Speed:{Math.Round(testSpeedList.Average())}ms, In {numberOfTests} Tests");
double StartTest(int testIndex)
{
Stopwatch stopwatch = new Stopwatch();
for (int i = 0; i < numberOfFunctionCalls; i++)
{
stopwatch.Start();//Start the Stopwatch timer
TestMethod(new Dictionary<string, string>()
{
["n0WY!<^[uOBgv90IkKr.32k^766c8>JCV&h%Sd#<Dc5FLmDvs}"] = "]RLt+;DG[wNbFQcv;ID9PYW-tWF]Fxtkr%>UL-mxvUIgL{?;AN",
["<;pl)K1-?K3A(5H8cjGTFGz%1>P:%sanS56M!W0!,(vof[?OdH"] = "(24wMS$On[Ext0]QQaL=m&Fg16^!wiut[{Db-*&7ZCo,*ERMf}",
["%oHM%?nIdZQAjKgQJEUszymyFMm'9N)29;n(=pVo=>r#)(otdo"] = "?^,Je<v1;eXV-baosiy04YN=vr41*akMnIEb,PHS}kfA4*BQ[G",
[":%l;wG!x)=x=<cH)XkTooD%Jlct]R,YnOD<+o>%V*xGttH-3Dw"] = "kdj8^*H;xpCI[P:Yh%ndZoQhCmTOaxPnGtG)%w9Nt5umMei2+l",
["FNwO!wLG:A{CFL>{[o={kI'Aj,H'P[q)}q>bpR4E,K1kaUE}sG"] = "1'4v,E;=(Dho5ufs0$OxBVabX%Q_6)ULOF<>G!mkec[rv;cC<=",
["2B[zj:T%AuveNj>fz;fit6ID_6dHj<gs7:0_8F#,_oA&14i3Iz"] = "8!ZL-uJHNY?5&@iNy8+R{ppD7<uFlaCjSwbRzn$CtW@Ux;>aGD",
["*zWMqT<=+dB[ZbmX}YJyrV.V'wx*=pgtaiD@@ij2wo*_QpGtBw"] = "#F#{w^T:!&fTtPV+=mj[s^K_fn8u]yAK}^XL.s9NwTGm#=[!Hn",
[")cX6R=1SsT#E%{Njwyrj_a7tW&'K9r>:>D;*v=#*oKG>]XsQ=*"] = "vKM*!*<@^K1t%X1Z(qhLt56*274<VIK{?=3b6vyxc$azA8SVZ2",
["h_#dTCr0K4l1@Z+UV'O?i{>w2IjYt%fz3PtE,ZEyl,h?r;QH+L"] = "<xcGEG[m!bo:mEKuBY+B)x[}+AwLK'_m'3JzPC7{%v^<^^c:vT",
["_7I<j[f_%L55Y<ybeCJ.(o>v,S%a$t*s8jOcJ42iqvZ2%Dqbb5"] = "l(m68eaiI0pa94#<<A%jeM,e^G'zU2;!P;[.S>Hqh}c[NTvhUW",
["3n6px:rZt20nJ2ZIx8$o*xIka;UoD&'5[<t'y'0Fs^F#PSt&Ri"] = ">,Wm}Ep'sK9:+F--eN?7ZO4S3h0#.A#O72%%tdA?h23qxU'g5F",
["wfwwwQm(y2%D&*<><CDTg%Ba,=8E*rPnDp&QDqD_4S_uoO4pu<"] = "dHm]JnznHT?8K)7=&zY+<c7-V)*#ASvl}bQLc)!vCd,N-Xt3Do",
["&1oFFBYbW]k)y3qTs_J*o<$gv)Uq-e=mmwio&2CJG&JQ=l_(L#"] = "&)oZ@qzT{?WeS(lOXO^og>wEGEDvltM:RA?p@zy{HqN>spGR{[",
["XL[FDaCvGeDo7)lx2qeuVt+FyK}Ky?EOv&%anFAG;<fZTJ8%&'"] = "z@.eF<pE%vnUmdF.S&([*i<oA%4N?MPlos-q??,^?0#[mlezr*",
["X45QcJTni_^z^JW<M?,tRh4my9Oe[H3uoYTq$SCs)g'OW$35+="] = "r8C$CV,+]A}.V0&x%Eu$yEc)(.IKzS]t4H&GA'cQIJ?-*F&W;Y",
["m$8EixdP82q$NyS;Fuj>}O2^1&f*%MsHulDKBAkSJ{H!9rGKZ_"] = "Pa,'Q)fdnm_9Lb.3KTm9LZl-$).(JYvt6zRR1:7G!6QEp]V_;S",
["Ui3Hv%L;#@o_ye!)_rKn@>DfT>4w({#ytEfj+4{,Xg}'MuOM-y"] = "6A9vaY6I?Q#{0^I?_tOa@8-%pPzjxUsx(>YlYD+h}nskloY#'k",
["%aTS{sg{@fr6'uT*_}5=;FWFA9u%On-Rll,S?:a<(@fpL7Cl0S"] = "*]tl)_m3^dTodr!&k5u;Y&pHC]Ok(yPp3#S[vhK]#Epl)e1@Th",
["rB<i3g5IOxm3*QB?0#suQb4ozw>'0?R#eOC_zE&x$w?pwPV5;x"] = "twLWAk{}d@]fj.P>RsFpP*y84>#C'z1WEtGSMveiv&G)=_dsr&",
["Q)a*%xfvR8J+%h#5EA<%mz^mA+6'=>;Z^g28{tpS6(Fn,[QQYZ"] = "FT{=Cvlh}imWs;w*@5y#;KiI$HUrbYITx>:-[KT-C#!G^CjA_x",
["G8g'd<&#<PORrV]^_kVdj@TB*t>[JT:JcDm_?:1QZoX6nkl)rt"] = "HO]tDLj<a1zfdmQ)CxsnGS*-Ir;%Um!Lq]+&S:F9id'bTf#sbR",
["^ajtgM.+lRtg??)^^D>xQR*r&lptT0%W,CYO+P4v,]+Lerwd5e"] = "vOJR{gdj!gZ:Oe!&07OrOV$yUo2Hy(huC]TQlGw80._5p_xs?-",
["H0T83fNu6@4$pisrS*Rn$pOKy^f#7_x2m#r&p7^^b{^tchm55<"] = "3Hy+sCvh)3jt78D4+G.fS$5AyVU4,qC5z*bq-W%lvhZLtk7NUe",
["J+$s;4$TeQ*cI%:nOmKM2!=dEudZZ^tNr(SzlLbr?ha3}:r59_"] = "V]HHP6v$0,]U1KLt&pgJc'D7q6&3J+p>iry..==O0.J*hHPE0:",
["kS%Gjj*x$,t$vXQA[-e}>}PyXZ+@FyA@S_G?V1NGh+9DaSx2Pw"] = "xGO07*@ud&*oH7EZ:7M_5!;8<#b@!o-&RI;!TrX'$&WT-V4vlq",
["=C.0AB9*8eCMzT_3i*()r_,P(>?pcs%Ar]Mb;,{NR.RXvD%Qce"] = "#!o,ZE6;O$i&eL29JD#0-[z:6c19W6cb.lF<&@v$oTmB_cvHC#",
["M7K=^Br;wK=?,z@eO<0C).dZ8Mo9h1MO<N@H6L.B<pHY=&8%hQ"] = "({&_IeyM^hMm{As'z.$&BDfR7WF,@M6>qOOl{56D[zHo!:}_gk",
[".{%T(+#q4kBkc!z$vCk<z.v-M+>JDcx,kk'vR'z(Jz+b$q&x@^"] = "x1IAR;NqUG_M'>r(qDj*S$<EP]13sY}O>iEt'wK@Hv-E.(}tBU",
["[o0URD[S-@8(M'!mw;h8@{w6dr1vptj#QG%r0pW,y]Uu>1s3Bh"] = "lfp>$<M4-n5xk>Gy&p9$134pK:8AxeYz@1j-Wh]$hrK44(es[L",
["]c0?z<&zwZ>a>ECgXBn[Q!}Yhw[;5R*Ta&=^Hqc3b+C-[0M3[d"] = ">}FTpcM<z{;^kZf)+iVn@67z;}?%*yZ]Nawl0(S({5Nx2r'Fit",
["f$wN*[ZqR2<n^fMX)9YwnZt{.2pSEJEKTRp;:jm*w@1I-b^'R*"] = "czkKRTlq?nX4B3Mh^H$RbVb2WJg8a_jz]WA+9Dus2lGTxE(']?",
["B.$&W7{5%yoxq1ttmdICoELd3s'?7Ph?.3arw<kW1Aixw.3SzE"] = "P+z,Lmk}i<LV3t,ZpjD%a]KM@RM<S%d_h+g>@,wT@1G-3CYp8$",
["r%Mv4q3,dU!l]0U#([;L}H7%L6rkZPheeB?SbCy&oaFMSPt^{<"] = "?g?*L2;lUIT;HSq,XQo<>Sm_'[gSCV;Xi-}XQ.nS*#]Jz*ePAy",
["Z%qX*QK9OWCd8T=&2Yk6f!fDEdU0}0wPyMp7bztqWAD!5p)lBb"] = "WBX[J0hLURq1VCru_p6N]{3)y(*?=4_pHT;j)_sqVZ0A][:%u}",
["nYGLEp5(%>jr;DB[fiYh5S{tHqShy$!p9=Qymav4pHD]fx'Y98"] = "6$GJIOc740%J?r.^H%P%g;C7,3QM.?Yn&K5kF)rV=3=0dOVDM^",
["EYR}]=s&MO:Gf2k%[b}azv;zmIV6Ti$FJS(?SWNe1ps(@o'l{t"] = "D)d(XQ;r:cE3zB,LgFD]Xzh#wBj^HY*_!M9N7z?1sPu+[PIuq4",
["N#kAk:Ia89VlMF!xk9_u6'sgI1FWA?pNadEWB7;$4(TLmQOda1"] = "r#1ZxbrsB_'GwB{CtEv8%?X1@#NJI&Y90-a]>?QSzNVa5IXK!M",
[":(H)IX3^6[*Wo]nA{OV-rD?#ED.[#g@i2K,oKmhX4@[?[,p<97"] = "5vpu'rZ$w$2$smXKiPo=M@ND=$bkO&tS?C'$C<DIh*a%%D_JP$",
["5qc]a%yCdQ*cDyfG%EVl1aVtc=Q*v?#mKLv+rJ169R,t]Dg08S"] = "'GY6,+R2O_8$G6Yc,@:%eCcf!C{KpmjSFsWBcfVXcCx-y.LGUO",
["N^X>{ZPfSH66H?T'lPBzmH_vH{(chx(6]PS?=J6<gN44bF<To^"] = "{TpPm%KE0ioX[-(_uU>sBAco^WF_nRRCqrX:>M6!Mp-FpfWjhC",
["qn0*%i[hr$,4YLsjDF>X*=].,@L.VqpfS7Fm:oR]jdz#JA>f,!"] = "4m^#U_Q})bV+=BGb[O0r?jklPtmPrt!mgYp]:U!M,SP9*@$i.?",
["=FuN&FFNuQVzEbnPOjIS4It.z9TF'.]6Dh%hm>(:imMQX&x(k0"] = "<RNF4;kU3jP6iI_24!vFYaHPCa7]#{weZ(13w'lIrR?(:7s10i",
["AJqs5QDj1<%$cLD@GniaZmK3GTUqwc5T[Q%g8qMI-bfGo[*Q7_"] = "B_36}l{5q{2deIB*$Wq$l+;g^chpaxSi)vT,+.4V4ZVK,5?tQV",
[":gGH1M=m*W)Yrb4hY)IjoYz.Ai}$!QD>WO!CzXD1#@(QoZ(4zW"] = "N%5AoGeHcR6A^P.{rKNssdBG}KuyK#8_-+Hzy>h&gTU,:DYK*n",
["*{RoE6;zW:?5T=&.b7S8q1npwMwWDxT&qNODzF?)>hzz.PUv6v"] = "kmy:-Hg[*e!9L}zDUKEVplVzO*#0CLh?6tRWHt31Joe$(t,KQp",
["?;(zc!2F[oT7Ror.%o*E0Gws5#btNC;T;te?n$?K&9O9HK5I_5"] = "YTFF0}#9*WNli:NvkXJ;N8}3F0TiBk=:ej3y4'Og5O'*sC@;vs",
["w,?mh9O?C,Vcc.fFoV3tZg.T2ajnQ(qd]1d$.SWn??2so;C!ew"] = "n0j6JJdJByodCVaK-4VJ3Fln,z$Z}xnMBL.RUvLQp)WR9%oj_'",
["L2qKFwZrRo70c3!'[?}-&L]N^Ql+LvZO2GK!AXd3N{l#Xgp'WR"] = "?d>k6ou_{D&ekkSw(!08W]_V]wRK(v]<xxa+XJ%;fZz_$(O,?P",
["V7$>N>*2cQ8<7qMVtQO)K,g#lGD2DySWYoTBgC_T*cB+BPOeXL"] = "l;:5cx%BN)wuTR;#E@1G27lCh]bOjtuEurS2{='uwCSc}!n!h$",
["3+6MPBHE@u]F=z?IfB#m$oIk$L_Ef%-B}Ckb5.Q:4VK7_1H'e^"] = "j20E(Q;sR0N2M'm:VjVxwNt8iGxi)Sgqh@=c&94'X'KS@Z?VuP"
});
stopwatch.Stop();//Stop the Stopwatch timer
}
stopwatch.Stop();//Stop the Stopwatch timer
Console.WriteLine($"Test {testIndex + 1}:Function Calls:{numberOfFunctionCalls}, In {stopwatch.Elapsed.Minutes}m {stopwatch.Elapsed.Seconds}s {stopwatch.Elapsed.Milliseconds}ms");
return stopwatch.Elapsed.TotalMilliseconds;
}
This works as well for passing a new dictionary into the function as gives us the desired output.
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Start Your 7-day Free TrialNew Operator
The new operator lets the compiles guess the type. This is new in C# 9.0. In this case if we use the new operator and the collection initializer syntax, then the compiler has enough information to infer the type.
New Operator Example Code
The new operator can be configured using the collection initializer and the index initializer syntax. Below are both examples.
PrintValues(new()
{
{"The Shawshank Redemption", 1994},
{"The Godfather", 1972},
{"The Dark Knight", 2008},
{"The Lord of the Rings: The Fellowship of the Ring", 2001},
{"The Matrix", 1999},
{"Pulp Fiction", 1994},
{"Forrest Gump", 1994},
{"Star Wars: Episode IV - A New Hope", 1977},
{"Inception", 2010},
{"The Silence of the Lambs", 1991}
});//create dictionary by New Operator with Collection Initializer
PrintValues(new()
{
["The Godfather: Part II"] = 1974,
["Star Wars: Episode IV - A New Hope"] = 1977,
["The Matrix"] = 1999,
["The Silence of the Lambs"] = 1991,
["Jurassic Park"] = 1993,
["The Terminator"] = 1984,
["The Lion King"] = 1994,
["E.T. the Extra-Terrestrial"] = 1982,
["Jaws"] = 1975,
["Blade Runner"] = 1982
});//create a dictionary by New Operator with Index Initializer
void PrintValues(Dictionary<string, int> dictionary)
{
int count = 1;
foreach (KeyValuePair<string, int> entry in dictionary)//loop through dictionary
{
Console.WriteLine($"{count++}. key:{entry.Key}, value:{entry.Value}");//Print screen
}
}
Code Output
1. key:The Shawshank Redemption, value:1994
2. key:The Godfather, value:1972
3. key:The Dark Knight, value:2008
4. key:The Lord of the Rings: The Fellowship of the Ring, value:2001
5. key:The Matrix, value:1999
6. key:Pulp Fiction, value:1994
7. key:Forrest Gump, value:1994
8. key:Star Wars: Episode IV - A New Hope, value:1977
9. key:Inception, value:2010
10. key:The Silence of the Lambs, value:1991
1. key:The Godfather: Part II, value:1974
2. key:Star Wars: Episode IV - A New Hope, value:1977
3. key:The Matrix, value:1999
4. key:The Silence of the Lambs, value:1991
5. key:Jurassic Park, value:1993
6. key:The Terminator, value:1984
7. key:The Lion King, value:1994
8. key:E.T. the Extra-Terrestrial, value:1982
9. key:Jaws, value:1975
10. key:Blade Runner, value:1982
New Operator With Collection Initializer Speed Test
The same test as before. Below are the test parameters.
Test Parameters
| Test Parameters | Total |
|---|---|
| Tests | 10 |
| Function Calls Per Test | 10 million |
New Operator With Collection Initializer Speed Test Code
TestMethod(new()
{
{ "=ROb-_Dm;*Kwl(z[<=R1Fn'<p15F9{xxh?o&]6U[IZ0862G:1W", "k4h:eMLU7zRIQm1r$=4,]H=#a>vCot*L0^PMzN4)^9'trt6>z8"},
{ "H$s<eeuFCOL?Cj}QXIl$IONM9>R}CND:5h8AiwX,!=9y>gHKV&", "s:#19A7F{p@F=0@I*oGPWw$pIPjeRj,p8-:^6D(a6rh:f>0>,-"},
{ "cYQs(tPW1!jFvBBxP.{]Xij^yxmj@_Jn8L=GS<;.p#(qkBbk*y", ";C;QC%3N2Fg#l0od2NEEX)1E@.VgL21D)T*GOvkjV&bu:V)!7X"},
{ "pj$Fz:z95yB''EQvbs00e?GqSx5mma$lHT5G$*R45]8+ym2&]$", "ZXm8Wwm9X]#B#E3%Q>(!Fl^tcnn=ztClMb^9>87H!zU6#,pOaA"},
{ "y$g{ePM%0;4dd4.*x)F(*3hXMkQy4cGpU^6'PoBhV(Cef3BXhJ", "n(TKy_;aZ<4Ne^S?68;7U:FCJO9{M[5I>zn{2t+d1y>AzTK@Ke"},
{ "h&?elScNgS}xAuwAJu!nu!!b--[0HOd+u%]X1ZsP1AVBv$U%+N", "D4Xr0).I=7UgPy4^}6G:9M#nslEi<AClP*D*T+KOCy]Gwa9,LF"},
{ "5(MM?e3t>}*[uvX8yJZlw,ca2X4(2b[u0WTK^+wJ,G;SGu&5O0", "peKmWnB;CEMR;y>+!8C}n_,O;_I9N.FL*<V#mr[qw,n*{Ea6bE"},
//...More entries
});
Code Output
Test 1:Function Calls:10000000, In 0m 12s 296ms
Test 2:Function Calls:10000000, In 0m 12s 49ms
Test 3:Function Calls:10000000, In 0m 12s 291ms
Test 4:Function Calls:10000000, In 0m 12s 193ms
Test 5:Function Calls:10000000, In 0m 12s 278ms
Test 6:Function Calls:10000000, In 0m 12s 627ms
Test 7:Function Calls:10000000, In 0m 12s 739ms
Test 8:Function Calls:10000000, In 0m 12s 533ms
Test 9:Function Calls:10000000, In 0m 12s 357ms
Test 10:Function Calls:10000000, In 0m 12s 171ms
New Operator With Collection Intializer Average Speed:12354ms, In 10 Tests
This speed is just over 12 seconds and is similar to the Collection Initializer test speed.
Full New Operator With Collection Initializer Speed Test Code
using System.Diagnostics;
int numberOfTests = 10;//Number of tests
int numberOfFunctionCalls = 10000000;//Number of function calls made per test
string testName = "New Operator With Collection Initializer";//Test name to print to average
List<string> keysList = new List<string>();
Dictionary<string, string> TestMethod(Dictionary<string, string> dictionary)
{
return dictionary;
}
List<double> testSpeedList = new List<double>();
for (int testIndex = 0; testIndex < numberOfTests; testIndex++)
{
testSpeedList.Add(StartTest(testIndex));
}
Console.WriteLine($"{testName} Average Speed:{Math.Round(testSpeedList.Average())}ms, In {numberOfTests} Tests");
double StartTest(int testIndex)
{
Stopwatch stopwatch = new Stopwatch();
for (int i = 0; i < numberOfFunctionCalls; i++)
{
stopwatch.Start();//Start the Stopwatch timer
TestMethod(new()
{
{ "=ROb-_Dm;*Kwl(z[<=R1Fn'<p15F9{xxh?o&]6U[IZ0862G:1W", "k4h:eMLU7zRIQm1r$=4,]H=#a>vCot*L0^PMzN4)^9'trt6>z8"},
{ "H$s<eeuFCOL?Cj}QXIl$IONM9>R}CND:5h8AiwX,!=9y>gHKV&", "s:#19A7F{p@F=0@I*oGPWw$pIPjeRj,p8-:^6D(a6rh:f>0>,-"},
{ "cYQs(tPW1!jFvBBxP.{]Xij^yxmj@_Jn8L=GS<;.p#(qkBbk*y", ";C;QC%3N2Fg#l0od2NEEX)1E@.VgL21D)T*GOvkjV&bu:V)!7X"},
{ "pj$Fz:z95yB''EQvbs00e?GqSx5mma$lHT5G$*R45]8+ym2&]$", "ZXm8Wwm9X]#B#E3%Q>(!Fl^tcnn=ztClMb^9>87H!zU6#,pOaA"},
{ "y$g{ePM%0;4dd4.*x)F(*3hXMkQy4cGpU^6'PoBhV(Cef3BXhJ", "n(TKy_;aZ<4Ne^S?68;7U:FCJO9{M[5I>zn{2t+d1y>AzTK@Ke"},
{ "h&?elScNgS}xAuwAJu!nu!!b--[0HOd+u%]X1ZsP1AVBv$U%+N", "D4Xr0).I=7UgPy4^}6G:9M#nslEi<AClP*D*T+KOCy]Gwa9,LF"},
{ "5(MM?e3t>}*[uvX8yJZlw,ca2X4(2b[u0WTK^+wJ,G;SGu&5O0", "peKmWnB;CEMR;y>+!8C}n_,O;_I9N.FL*<V#mr[qw,n*{Ea6bE"},
{ "Q7!(PPn$EgUcVlkhlLra>K^=a[EF>M8LyTbhhE=ySftgAO0<NC", "7x;0fsO,IT$)VyEohheAL1(s0+YqU&Qj:SUqlOp@cEe5JjLNGG"},
{ "U>]8.JU)Bus3T@ZufAxS@7!zfTbOA${7MR6ssuQSg[F?^r,$5(", ")#%<]#<j00lQ$$*}Q6_#eOe%,=h;76vUM6ukFg8?6Zf'l%H@%:"},
{ "%(B7ylj;vidp8mMCG7z'9Y$5UL8?nmYAu1F^yW!*X+.4(sWLoY", "91s+-#utiu@%s&eo);A#rqDxrB-WI2v}f')Oequ<bgA2!vOaM."},
{ "iFKIG&jd4Sdq[Sb51(hnx({TpwL.n4PG=VzKfG:3)<g8a:7H$^", "52HDrL3.3cY?eY'YT$^?esF,fuX@i!C{&W_7*,2FIC:%gX,iES"},
{ "?Y&WnDBP*q{+=S)zs^%t4P7u0-PLH;Ii)0Jl:UkOx)A)OF1^Zn", "88V[dLUe?5;7x<)'=Z%g6VIJRyagJjV^7>ab2NQRw.e3cj{UP9"},
{ "U<rMyAN$7Kv)CLoA-pmmakaw9e%OSQ=7Jver'2W?;)Z5^bzthA", "tSRWdX;tn;pLhrnCqF<$:t=Z?gbLFONJyfGsbmbDb6j$eP[+G5"},
{ "kw+(!>^i=)L8BW{vKyg9{f^n:}eM!04P,u-N.0.]kTbm&rtKxE", "ehiZw]UlZ&a@6Dbqz_MSC%Y=JNy[jW''k#lNw'oZV}jKk36TiV"},
{ "I'4M4_6o27?_9}gPWR8=(B@[AA5}<wBC+A!l2W'vbGVS#!^{[s", "V1H6sr}JC0q!PAhfp%yxEFoH30XGSWSIv{wlchg3#Y7AJ&-@<h"},
{ "j'FA-4K0O;LVae(^PS9XUnUZC^dU@dg%.BPgpp$B_>Vz'Py'71", "<=7OH*O>6oH<j8}RUdE*Qq-Qgmh{tXiEKJX]6z]vB?n%WR0asX"},
{ "qXE#%op%NGW8Pum5!<LV.fJjAM[p^^w;6jwkb5L.<d0z=0GIHM", "!8bfzh!X+Rn,[1_mE0v%ieD4xG@a1_QD+SongwQF*W2i#]}xgD"},
{ "&4%zT(Ry_As#1jC7H9=@qV[u'Sg-tS:L5!A-ezGyKywG+X+B%I", "JhaHU5{JO3w9D>&!MsxP(hJ?MXMsAf;vnUYZfg+FXMI;[wB._["},
{ "A5tpuU=F4J{;Ehs,k[u#41bBhw(^XrG[>TTNS9eZMyJQc(Z(js", "m{176J^6$F{HP<[rFL[+R'Y({D9nkm0$)0{,hr$.^?}:Y{RWJ!"},
{ "Dp+k4u#-#=,8JBSgC-ofmh=qtv}kgPy>%,v1BCIs,G%$>_yEn=", "OCB!arsi<Nu@EP;.[^[(Mo#$3o$F%c9Pnf!B$]!=^!A7fDTy*U"},
{ "}ObFbxG2@'k4&{S)pq?4j6ihW}Er6xslSou_LtduMrZ0@[S)o#", "=Z_ZAxDp[<s#d^!b9fq,+Cn3^W7Yw9?@,C,'Pjcs&S,+_RbFnA"},
{ "EzS?w%b$!1GBb;?!G22gG?3>f1}(7L:E0)iDhocUh(S$@PVI8P", "%'CY,TkAs9}]YiEvdpD_:eC$I'hdOX5K{49OIRBhLOL&.yOpXp"},
{ "FMh80M]W1h]-,a2(z,8boIXGyx[p>2EGJh;Lfi5TJsi4Rb&DSX", "u}e9M>6fEKm'W8?<1E[pu&x(3Rgln:lx.t6T,!p}MLEDzm5khK"},
{ "4+q%TXC&gsO=]drC%Bz[,WN{H9v,hohef!-Ci^z#7^v3$E-m:r", "{''&O3ss2oguUg*a<#H#e{=q>{fYf'O[HIMURspF#FU8W-aH<o"},
{ "}Mqq=b#$ar*FpjxLF#K*N!LhFC$=aOFvo.yJ@-Cayhz{2a!$*j", "w#0QzF]gOs^=qy>'k}nd>HY;wEcCp+mVuB;jezSz_;r>F;UWIJ"},
{ "t>g1>R]8No}y)FN'q,Ey!7Iz)nahpfnqstVYT[pQS8t7VT3:-j", "?9jv?uh{KnP)I&lw0+m'd2_?oZ<m3&PJsZX2fcGd8j,tk$[F$j"},
{ "IY-kRqS>5*}k72!NZ#Hxl^$d8A^=BAX&TL1Ord!1Zpd?&@G[j7", "'2aoz<&Vj(*UF'a_w0MvDZ4FsqnB6x(^Q.Rb187jlKqA{Pb-Ko"},
{ "AU-nd3yGn#v@HPOMfl6An>!@ivyvhP2m:KZlV!onn?vwvlnl,S", "C?#XlmOOINwW7-H(.$AdRkT!$%9X4cohbUeB}q):ElY>{oUE#N"},
{ "T&_-^LHe4Zl!93.,AC+xt[^x2UXVRxr4ThG2t1R'%5dynJGTJ#", "SqV%GI:%Zut+w[(aBeXPOL=UXdK6jG*tL;d%i]lt$uz;.joAc*"},
{ "M{041FZFwM<FEH%#eI(0=P&J@{3v,&.Fud)3jcAhm])PI)d-zh", "U5;[RfR7HmSz.VvJt#Z>RVDDu]Yzo0}dlIe'uGG'}.*#D4^GRr"},
{ "[ScINOa<P&}Q6yJh*'J-wNY=kQD+!li]REdA-6xkl383R4EbQE", "r.(8QoYp!#*aL0rsfEJxu9Zcv1%:C?ch-3%ml&hAZh4I^e3CeB"},
{ "u9N(.M<,A@EB4KovhJ#GRpY:)5v;}pR-D8&^Tgb=_dy!gHbRkp", "M:TZ8TOjgP^E(J9ih>_pNW*T^zzNlUL2voNC#7jGa:c>0$$UNK"},
{ "e.!D-$=z{LMlWt':'+)hys[%L$DeVFO>z*r_usciE=Zo&*yQj-", "SR?9@nK7b!(iYMoD8}I.tIWc[&UK^nYjLPwBjQQR&>q7}-@AQK"},
{ "'5:KCgl#;p40.MQFiT6p8Oi5xF$)skUN#}f-e7,-o&=#.0[p!5", ":&WDA6B$O#zNU*SOl24S6KvGOtCgGC2eUVH>*DF27z[mIrU@3V"},
{ "ISxp%eLiD3?%L-pcQ1y9e^*%dAW,j6wd&8%*g!@o:^+m1CgH@F", "B+O2Okk?yh:Wd#TF(kL%mC<ihOM0x>i8%!8Lg(]kZ3q4l4CVI?"},
{ "s7UEqA2w6ifbk&sPV_nXiRjWG<<0LMT7R5nE:Dv3t,au5&%PSz", "X'%^I1px<VW)7RvOh9I4oMAufSsNw}QhgB@0qJ(rox}&fae;?$"},
{ "paUZz}N)huipBor4EGG_OaGZ<&Dl_jm>oV,5*3<QPn^D:Kh$zi", "G(ToR6JqS]9IkH1AY*1dHz)[ec6DStFxzxGo]zAoR+5yP^m{gm"},
{ ":mJT?0{j$0sKQb!ereWpZ@g].+z!uRt#cb{zt1?urkXj-l_Yz^", "V]OYN%y7OC[HGtGrp=}<8c#<*[4%Sk(J'prK(7Z5kUtU!(yTv#"},
{ "+@]F8xb'])6t:Y7K[SIzfx<Q'dWAcb)S5j.]spL#h#>XVU4?v}", "x44Y@r!luhEH^wOZyff1R9<wCP^iFL8')?TKfLR1&?5!A,%5^,"},
{ "IkR+kjNd#22W$Y%wf<CN*;rIJzg.r}6j(_4;Q4BR*aWLDuSpu.", "S3D'k{6Wk37ys=xL$xhg.A%lbFCk#hPoG+F-8;1bIBE&(yof^("},
{ ";u}AycPQT},'3sKnHtU-uyn{@4of2b3)L:<%3YrE5%ts0nI^c=", "q:g8276lC$2u6p5(B'a]6tU?(4H!Alq>B.n;]%WHV1Kd,:TYV;"},
{ "#LfsiuwX=>*)6GfII8Ql]}i:Qy?cAM=t?4TYi?aCnscH0cOc[]", "HL2xRrO_*Vj_%WA&6cZb@yqWX(B?CFLiV)Q}i+:IcI)k-TcdPI"},
{ "b2uukbx'{Dr8d7h4LM6j[Evj>vgiL!k6}EMnLmtq0ZtRRn7:a.", "loN?af4E0tSw7M-B0pUh;JQ!JCaqnQ1wrNsElg7j^!T:d2Bl)-"},
{ "C}O}=sR9mN5DUGckzR7ktBL{I^U,1:cB_fS&fs1FB9j06ARglx", "uP2>3e8BR]D$*E+,Zjj}T__z}bhHM{s6RZXY'NyTr1lT0Otkh4"},
{ "{-5d*)QUJo'8m@GkxN'?94oUahy0<gQh2AUX,}G,x)[:h*axL&", "LZYAVL.q(ZSZ3Vo]5=aPk((<Bo(iKGe3[3s@K-+=6hP=H%dci["},
{ "hSO3jq1{<XgbwQBRRukTWHMkNo{kwiio[E_q@!$!2MLI)1gR*D", "7_C(HS[ZA#nzJW$}&wJWMF{V2Hpvg(TG4<1zuNo-Un_H*v}^ZR"},
{ "n-Tm^k<)y]GvJ3Ay@gvGQd[B4sk_okOG24}XL?-A5)Q[RjrN4y", "..!QcTLJ%MCkzjTGqh]B^8Z5brG1_:B]HEYZiq{V=*Go)?T0W4"},
{ "3SS.$aIM^VvqS%4n$u@,A'Xd>1]nAZlzMM]&=@CuY[+m;tjS%!", ";t{P<47YVx+<C)bWaGA#hdS&#cy'WY{L$&=;({!^y7+5*i-+8O"},
{ "Z{0M2:B3@qYakr}AaLg(y8CiX](U^Z?qtBJ}^CK(@58ZGWG[Th", "x+DGU5pT-=).Dd=>W,Q8aVxy2{ZV%:nWw._BD)vd%ZoK;,M<O*"},
{ "]li-ZY5{A56vpoDSwbj0y*I?mka)n$ye$)gA{MFi@k.K?S5sa1", "@$mr;$isKJR$[GF3R)M6)j!lQ(1h#Te3^pw$%e}Rz9?6!c7]'#"}
});
stopwatch.Stop();//Stop the Stopwatch timer
}
stopwatch.Stop();//Stop the Stopwatch timer
Console.WriteLine($"Test {testIndex + 1}:Function Calls:{numberOfFunctionCalls}, In {stopwatch.Elapsed.Minutes}m {stopwatch.Elapsed.Seconds}s {stopwatch.Elapsed.Milliseconds}ms");
return stopwatch.Elapsed.TotalMilliseconds;
}
New Operator With Index Intializer Speed Test
Another test will use the same test parameters as the other tests.
Test Parameters
| Test Parameters | Total |
|---|---|
| Tests | 10 |
| Function Calls Per Test | 10 million |
New Operator With Index Intializer Speed Test Code
TestMethod(new()
{
["fvPqO76+Nxsjbq11w(L!vUQt3+sNouxM*$.{?{Hv-[!dCPdKj!"] = "*ubjUmxq+vF@):2R0flzcnqPaH&e;$OdK3Yaz5xJy__fGf0AIs",
["xo*M:kt$2[w=9_90:!K48pz,&'[-4+O]&A9By]X7_._Vp=7kI}"] = "WJKs5'kNcoy>8#l3B6.a'PkQEjcx;rPX;=oD1]7:E2?-Y2E82v",
["W;p7lA-U@;2B;Jcs'?_&Yi'C2xzsxzMWnR!-DA])[?%q}i:!H;"] = "ru?<&X[n=tFCGWIEh2BbZ9<HRVi&sM0s;3v}#E0<4T%mXpb8?H",
["@@]j}($:iST+RQfd]nzgn9WD7<Y{fA*kg-mg#tgEkunoApG{6K"] = "hfnlC_g6Yb^v>MRBM}pHOTPn}z='na!.#*+f,FHws4bIh(P?kP",
["eY3=3&92&WJf+C&=ZGh6^)X>[gBF}5';>0i9(W?(Gh!W%M{E1h"] = "#HGpIstZ[EKmY:F^zLdc>K'0v?Z#@rdDSXdV9h}NcU+y9Fb5Ek",
[">VFG?a@r+b}P]>C5IWkycEy6KvZ(@[hkQ<U]hKOVZs,8,%OgU>"] = "XVPWRKCOL.Irj=,2*}I>efh<CTYwM$HG_mX-9v;2gxFlbB5'tV",
["q*QN<DU]&6jr+ZZu_n)P#&G7OHv2[<ir&MF,yd![lYGj]5Y,@!"] = "tzHnI7ut@FlocTka[5pIWvsd])+_HnjULIdo$rwu)^f-.z8zm-"
});
Code Output
Test 1:Function Calls:10000000, In 0m 12s 357ms
Test 2:Function Calls:10000000, In 0m 12s 241ms
Test 3:Function Calls:10000000, In 0m 12s 27ms
Test 4:Function Calls:10000000, In 0m 12s 208ms
Test 5:Function Calls:10000000, In 0m 12s 208ms
Test 6:Function Calls:10000000, In 0m 12s 368ms
Test 7:Function Calls:10000000, In 0m 12s 381ms
Test 8:Function Calls:10000000, In 0m 12s 262ms
Test 9:Function Calls:10000000, In 0m 12s 290ms
Test 10:Function Calls:10000000, In 0m 12s 187ms
New Operator Index Initializer Average Speed:12253ms, In 10 Tests
This is speed is about the same as the other new Operatior Collection Initializer just over 12 seconds.
Full New Operator With Index Initializer Speed Test Code
using System.Diagnostics;
int numberOfTests = 10;//Number of tests
int numberOfFunctionCalls = 10000000;//Number of function calls made per test
string testName = "New Operator Index Initializer";//Test name to print to average
List<string> keysList = new List<string>();
Dictionary<string, string> TestMethod(Dictionary<string, string> dictionary)
{
return dictionary;
}
List<double> testSpeedList = new List<double>();
for (int testIndex = 0; testIndex < numberOfTests; testIndex++)
{
testSpeedList.Add(StartTest(testIndex));
}
Console.WriteLine($"{testName} Average Speed:{Math.Round(testSpeedList.Average())}ms, In {numberOfTests} Tests");
double StartTest(int testIndex)
{
Stopwatch stopwatch = new Stopwatch();
for (int i = 0; i < numberOfFunctionCalls; i++)
{
stopwatch.Start();//Start the Stopwatch timer
TestMethod(new()
{
["fvPqO76+Nxsjbq11w(L!vUQt3+sNouxM*$.{?{Hv-[!dCPdKj!"] = "*ubjUmxq+vF@):2R0flzcnqPaH&e;$OdK3Yaz5xJy__fGf0AIs",
["xo*M:kt$2[w=9_90:!K48pz,&'[-4+O]&A9By]X7_._Vp=7kI}"] = "WJKs5'kNcoy>8#l3B6.a'PkQEjcx;rPX;=oD1]7:E2?-Y2E82v",
["W;p7lA-U@;2B;Jcs'?_&Yi'C2xzsxzMWnR!-DA])[?%q}i:!H;"] = "ru?<&X[n=tFCGWIEh2BbZ9<HRVi&sM0s;3v}#E0<4T%mXpb8?H",
["@@]j}($:iST+RQfd]nzgn9WD7<Y{fA*kg-mg#tgEkunoApG{6K"] = "hfnlC_g6Yb^v>MRBM}pHOTPn}z='na!.#*+f,FHws4bIh(P?kP",
["eY3=3&92&WJf+C&=ZGh6^)X>[gBF}5';>0i9(W?(Gh!W%M{E1h"] = "#HGpIstZ[EKmY:F^zLdc>K'0v?Z#@rdDSXdV9h}NcU+y9Fb5Ek",
[">VFG?a@r+b}P]>C5IWkycEy6KvZ(@[hkQ<U]hKOVZs,8,%OgU>"] = "XVPWRKCOL.Irj=,2*}I>efh<CTYwM$HG_mX-9v;2gxFlbB5'tV",
["q*QN<DU]&6jr+ZZu_n)P#&G7OHv2[<ir&MF,yd![lYGj]5Y,@!"] = "tzHnI7ut@FlocTka[5pIWvsd])+_HnjULIdo$rwu)^f-.z8zm-",
["Ir0NjR5u,1+c?ZF&LavAlO?w=-.kiEeCa$BoInm@e&[8!+N=oe"] = "t']!8AqG+X>p5m+5IX!@QoC,dH&C8TTT*EItl6o!gdyz+d!}_q",
["3&):n*H2_:p3iL%QHdZGW<.>,(z7X)fg:j:O@+TB@J;KfNNzH:"] = "mObrws0AXNhgkp8PCmENI:eBu{0.p18Y*lpq3C@0)}hMum}GBf",
["lsV-14*^p>X3b}#)'LyCBu]mxB{wq9@maF?kC[ROW*0H_K}.y7"] = "8z>v.y^&^+^A,Z(5BxgP,@m>:I(2<G&i4rL$AqJk5P]XW*Q==Z",
["erKdxBFPZ=bSJL[S<+l!Sw'xt*Digg>X{<PWC{&R(0sxr%5m@O"] = "PDP3*HJ!veb?]j.qRN-X}:G3cS'aHvcd$V6og2&qtEn6LIAQfb",
["%bf;hk1xSs3hRokMpc'3bTZ$C9LnadB1tFGiNHBGFxSO2x.a<q"] = "*@*q.DJHS48[-^pR&Wf-c.uOXG],adKDnCz=2Hb&?cho'Ar$_R",
["uIS&ZLm]W$w[.6Rl]_NO+'67:dP&:d0&eg{Asz:)K9N@v3Wh1g"] = "vcePre:GzI5rk4w5]vuo5?u{mnN=n.ftBAo(JXNF)P&<ooR%-C",
["m%MP{DrW_&#z?w-GTnYNH1'hp^gK;_xG+W#<Y3BJ]_Afvvf8Vr"] = "ITYzgrt)WvIyp#yg,IACQPb37H+d,S;A1{d>Wu4?eLV$d:$n.W",
["AP@g8h*.=a+YfNJ3[EOKVAN=i0+,PQ)L#G@Zg(I1to?t4[2Idb"] = "]7-oJPCdsnLRMTr,]53wej7V+)fV54qzp?#1J!2+_s%b!Ec_;f",
["_DoKdhQmtCyDwZR!i!TX.yfBHiRfJy6r-Ip1IU9)L_BnQg'+>e"] = "GZ3a2ua?MExV4<K$c748l:8X7b[J?nv[R@eipsY$0Vq.N8f=rd",
["mV_6G}uVlwxs9S%aB$PU_ktpb*@G6p2v2[6>5Fa7VEI!)I;YH!"] = "Q=O_%cpGXczz00;;O4_Lt,L#5NUA<i6g=1^)s:2}G^9F%R3ZGM",
["%QT#ny6zo$Y>$X8rfAUog#{Swk)R-hJQjVq.erd;hO4dx[?EI!"] = "x9_Fborf0+&h009.ZO2;n6Ds;F8)KXq#*T&UC(&%7zCOLrDw&Q",
["vAJPK]C-@t&a.zRZnN?!1Z)HRD99r]}#fa,Qf^%.Gi}h<c$F]N"] = "bJ=;>nF9fvy)c*wRRr[PPvqbg<!88.7C=ZK9Ek7X_E:z;>Um'S",
["e1_3nb'gYYDoIR*^?IF#jcJ>Cggw3'AIH,f1R(6A+&!]wQw;!M"] = "Oy9;n4[:<E]a26Mbr83#CJ06DA:R#p?WA8{-#tL*(7].,hL=h*",
["$6?}k8(a*:Anx^IIXw]z'^Fy4B'>!{iGtx@jf5cb@m$csXXmT,"] = "lV+W7!ePUw4&xF,!OX5Y9x'PN<?>&Z=ZhCe*a.iwb@osfmb._!",
["Uv7OD&3n2%YQaV{lyA$gFlbX8RDT+Pb*0I;)6e?+1Sv*bb>Q+n"] = "Szo(+A]AB>I4J4(DhbuL6=_'9k%{!bjFGr*c{$eayFGXn05m)z",
["m*6;WBbiz^d!CW4Ij&3EP06g(!:cEw12uEsdqK$3lV7pUP[ULj"] = "B},JT4?EhYZvzW>9WTJ='@&FoHAPJEuR-Njxd[:W@Gl);CcuUN",
["sis66iRxI*07Vp@'29Irg{M^EbCO;1^pTP-I!&}Fd]f%W&tij6"] = "@*7]I;sW[tL6CvxbgAxGR]#fviNAH_Zt3ui;L$v=NFBXz?Ejga",
["*O9Jb{W@0$V_jxVv1bJUv(01q>(A6^@3f]<H+4ZdL?KKvYY-^D"] = "8d1}QNr#CW,Wydol2e_.{Dkw1WL4J%eRU<3JR)pP,wkVimeyfi",
["fK,PBNaR@^f7%=U]4w.BITn:g9K80+hX<$gKBmxKA[Q,NM,6A0"] = "WDh*zNIgJ]eT^Ffd.E&Ofv2tkRU5HS=dG&T}YRR5aJKY?#?)9n",
[".:!YFgKrm{6Y'rN,zB=pnct,qurATk[vVSWbnT7hVn$C[tqn+q"] = ":4I{@!-FjW;23&N{F2D5Gbc%?qA]5Rtgg6Go8l8kb_fc[4QY.B",
["(V3&%ZV#,!A2nv$;b}<-(<*OF,@hWHK.apIt<Fv4gb+Z%YnY=;"] = "-BAvZlJIRkwvVt24*+.%k:yV32y+%H<x&9pepaJ0ED4569V)g3",
["qeSsW-M7jk>u%X&3}deTZ#V!0Yy>$9r@gAosap9<H7d!6cP]NX"] = "R}&J^$Oh<_jL6GT#joC&3dc'5l:Ta36H!WJb(-Z>]Ky&11}gWf",
["BAy!MwFx(c=fv'yb.,w9m$a:gEhygq}5j$a4D%adPhU%MMxl(R"] = "}Cv)#9pHZn%^3--=l[(w}&_8CNQ.jvt*X}N$-q3!2(&HjHuIqL",
["4@^5SuC62;tJVFr_7rI!wD>YW@G+B2WXUY?KL,LDW._Z_jZ&N5"] = "oY!JBln@RuVXAj(.Ij2hGz,,odTVBGeVauto#4*c6Ks-0y$2^]",
["@mJ{Aw[5)U-z#1LWN%azx+f?;R&ODSfz]?ZHG!?HafQ.+RoXhn"] = "ilJj&iVn,MTvGn<=Vv?xmEiak5_b#j$l>*H(-GrTQhev.dfvN?",
["nGrj-<8eXqkiNHatA'7pchB=Lx^RL>Ak8N!lrI0gscj;1DfNQ:"] = "E+(>8&z:.chNV_!PM%Zh]-}YTZL2K;3BPvbUN$}m8*g[IR$&:*",
["?WMLl&F=hn'x7XOIiIw0!4MABLR9SA.K?(NGnIHt3Vk!_Sru(G"] = "FZgb,h,yBayXN_h*LPJPEyu,MjsWkPCfUSLAbFGdu<SL_l^@!T",
["J>W3rSi0u%y.Py2<-guP+8K[TZ[A4DZa{WGCz*uSFYO0A$v-3o"] = "CF-]>XqUs_A#}nDo[l}kzs]f72*3YW;V.K7}o(O^eonJTq<3Jx",
["QV:(Q*c8SNQHeGNvF%ypq$8e>T]<Pc13N7^h[(6pD:j!+)uZ97"] = "en&Z.[{@Z9SgLzEm?R):%&rvrYv'v*e1MNz2ou(Kyx[M{Y.p(%",
["NC,[&[Wceto$?jK4OAD=R1#e,=QTL..t#9A$aG6I2,$t@C-coC"] = "T4@D!bd1V45wZK}Sf9A+dU5Be#2F3ArP!QkycJ*DzU89I0xy[Y",
["q0R_J?XZ:O$d-#Guos)E8soJ4'X8h*FGWEft9HOsvwhKLA'!Mk"] = "Xa{Qi>rTPF[)1nKhOc3&2Q53,!h,+Z2nS=FwM*RBcd[WX{.UXp",
["ioIDM.CN*Ew8dh.5_}[*aKf<A+HN(0L1?kmncHlLC1G+wR@NV)"] = "KAaMxtzS>ZC5t)u#FlR_ku@Ve>h9cP-hX5sl-[^V$,SSD8aImy",
["P4DV1y'8UU&%Uw5B!%(Ps9tXU?zN+,&?qh,k)BE0e:Lvk=b=Dw"] = "c,R[Mt@3Aj{z&qMkw_Rs6E$2,jyb-<;JWevdTD+fV;%CvV;UL@",
["d+H73HYyLu%bANc&gzu%#YM9!8YOs>@s?oAOR$LFM2pJT%$sUh"] = "pM=^VS9Gq:ljjI(d;x!]b7Gaq>b0L6!HD2L.l-5a[d$Z$>,-7f",
["J45Fr##Ih&kA9E_-%aP[#*O_uP?81sbFqz'fF8.^PZ:]d)R}{W"] = ".Q]2PM0BLI=vJC1C>D9Fv&@UYGYotajpk3KCAIlP4>I('5Y*ct",
["oTimy0U['x;#-yj$ai!Rb$Tz6mV}4W1PQOzGwm{(D'(F-3})j]"] = "Ig:4ZqP9S;hqdC%'8@=&kaNR2qsO2s[S.!w45UKpBAPwrYU*m)",
["(j8jj(f+@=?tU,U!M%s$mv>av2_(q}XU>nMF<2UTU6>>G0^<E;"] = "5JDWC#gQun9}_u{wq?)(K.m98zHB43wwp)?rAX'RKY,zXwq'q+",
["-i)7{'sO;D[l$eFZcadgUzP4]519y>F0W=$Tb1DJ10Mwusk;+j"] = "OKXjB5%h$]7t><0??pbT$'lx]%cTPxUXxi;?P6+Dvjx78JU0t6",
["hG>5=5QVKmGbH:=BIu}'rvGsHe5a9OBQzq;l2>5zgT8-Qpm^oD"] = "1@hP?2ymE4z5jSnq{pV)Z}U-Y!u}[EeABpCVEM54Lw:X:[K3Rf",
["j#FHecR*=8,{W}LcX(Y*?7$H4):w}p5j$55SF<ZR)n-'@rFVhY"] = "d=tzoV)3U)lrzm{X(awhy#q6m{H??CXbY]]CQIR7p[3e}pKFK]",
["AqC0p,2M=IB,l9.>m}>D@5y[,vqt1O4HCNcc:k79kmD]odvEZ,"] = "#>jqgLRpahCeI-P@*k?8%IZT2TcveemAWN:i@cT(_bwmtsA)PN",
[")r3(dsx?E:'rw9hGfw{dsvo.Di;KJ&9+rTFYWoF@[9}fdl-TEc"] = "@)R5:9N5@b}zy-#CL'B&0wrWHatS4=JeY2Z4$JWk:EE,$?:rSA",
["&K,r)j]YMZ;K_#^D,6x3Vbx=k;nPc[=P%{E*6%!2tcHySZiR(t"] = "OjxJ=EoeK].bq'c#&=P(D4bBYYqGwzZ9BWe(qDHZ<1t&oDY[Sq",
});
stopwatch.Stop();//Stop the Stopwatch timer
}
stopwatch.Stop();//Stop the Stopwatch timer
Console.WriteLine($"Test {testIndex + 1}:Function Calls:{numberOfFunctionCalls}, In {stopwatch.Elapsed.Minutes}m {stopwatch.Elapsed.Seconds}s {stopwatch.Elapsed.Milliseconds}ms");
return stopwatch.Elapsed.TotalMilliseconds;
}
Conclusion
| Overall Rank | Method | Speed |
|---|---|---|
| 1 | Index Initializer | 11824ms |
| 2 | Collection Initializer | 12087ms |
| 3 | New Operator With Index Initializer | 12253ms |
| 4 | New Operator With Collection Initializer | 12354ms |
The Index Initializer is the fastest Initializer for creating a new dictionary inside a method call. It is almost a full second faster than the other initializers. It may seem small but for those of us who are looking to gain any kind of performance benefit, give clearer guidance.
But if you prefer the other syntax styles or their compactness and ease of use. Then they are not a bad option. It may come down to how you would like to write your code. I think that the index initializer syntax is easier to read than the others.
Know any other ways to create a new temporary dictionary in a function call? Let me know in the comments below.