Programming Language and compiler
Benchmarks

Zig VS C# benchmarks

Current benchmark data was generated on Tue Jul 01 2025, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][4 cores] AMD EPYC 7763 64-Core Processor (Model 1)

* -m in a file name stands for multi-threading or multi-processing

* -i in a file name stands for direct intrinsics usage. (Usage of simd intrinsics via libraries is not counted)

* -ffi in a file name stands for non-stdlib FFI usage

* (You may find time < time(user) + time(sys) for some non-parallelized programs, the overhead is from GC or JIT compiler, which are allowed to take advantage of multi-cores as that's more close to real-world scenarios.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 987ms 1.3ms 197.6MB 1000ms 140ms dotnet 9.0.301
csharp 1.cs 1008ms 13ms 179.9MB 1017ms 137ms dotnet/aot 9.0.301
csharp 1.cs 1685ms 31ms 103.5MB 1857ms 217ms mono 6.12.0
zig 1.zig 2079ms 56ms 49.0MB 2047ms 17ms zig 0.14.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 122ms 5.7ms 36.6MB 90ms 30ms dotnet/aot 9.0.301
csharp 1.cs 142ms 0.8ms 41.9MB 120ms 13ms mono 6.12.0
zig 1.zig 152ms 1.7ms 7.0MB 140ms 0ms zig 0.14.1
csharp 1.cs 203ms 6.4ms 50.0MB 157ms 33ms dotnet 9.0.301

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 2256ms 12ms 2.5MB 2227ms 17ms zig 0.14.1
csharp 1.cs 4114ms 9.3ms 18.4MB 4090ms 10ms dotnet/aot 9.0.301
csharp 1.cs 4957ms 5.7ms 37.8MB 4930ms 20ms dotnet 9.0.301

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 380ms 2.7ms 1.9MB 363ms 0ms zig 0.14.1
csharp 1.cs 681ms 1.0ms 14.6MB 660ms 3ms dotnet/aot 9.0.301
csharp 1.cs 884ms 5.5ms 34.0MB 857ms 10ms dotnet 9.0.301

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 2-m.zig 634ms 3.4ms 1.4MB 2393ms 0ms zig 0.14.1
zig 3-i.zig 1791ms 48ms 1.0MB 1780ms 0ms zig 0.14.1
zig 1.zig 2728ms 20ms 1.0MB 2720ms 0ms zig 0.14.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 2-m.zig 60ms 0.4ms 1.4MB 200ms 0ms zig 0.14.1
zig 3-i.zig 147ms 0.3ms 1.0MB 140ms 0ms zig 0.14.1
zig 1.zig 228ms 1.0ms 1.0MB 220ms 0ms zig 0.14.1

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 88ms 0.6ms 1.0MB 80ms 0ms zig 0.14.1
csharp 5-m.cs 137ms 2.4ms 25.0MB 370ms 107ms dotnet/aot 9.0.301
csharp 5-m.cs 190ms 2.4ms 39.6MB 470ms 117ms dotnet 9.0.301
csharp 5-m.cs 227ms 8.2ms 45.5MB 643ms 93ms mono 6.12.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 10ms 0.1ms 1.0MB 0ms 0ms zig 0.14.1
csharp 5-m.cs 25ms 0.9ms 16.0MB 40ms 13ms dotnet/aot 9.0.301
csharp 5-m.cs 67ms 3.3ms 37.1MB 90ms 20ms dotnet 9.0.301
csharp 5-m.cs 71ms 2.0ms 31.3MB 100ms 23ms mono 6.12.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 0.9ms 0.0ms 1.1MB 0ms 0ms zig 0.14.1
csharp 1.cs 6.3ms 0.3ms 8.3MB 0ms 0ms dotnet/aot 9.0.301
csharp 1.cs 32ms 1.0ms 21.2MB 20ms 0ms mono 6.12.0
csharp 1.cs 38ms 1.2ms 26.3MB 20ms 4ms dotnet 9.0.301

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1-m.zig 321ms 1.7ms 67.1MB 853ms 20ms zig 0.14.1
csharp 6-m.cs 455ms 12ms 46.3MB 1230ms 20ms dotnet/aot 9.0.301
zig 1.zig 504ms 4.0ms 27.9MB 480ms 13ms zig 0.14.1
csharp 6-m.cs 970ms 98ms 69.4MB 2217ms 33ms dotnet 9.0.301
csharp 6-m.cs 1026ms 21ms 65.9MB 2957ms 27ms mono 6.12.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1-m.zig 65ms 0.5ms 54.4MB 127ms 37ms zig 0.14.1
zig 1.zig 67ms 2.4ms 15.4MB 50ms 3ms zig 0.14.1
csharp 6-m.cs 97ms 1.6ms 34.2MB 163ms 13ms dotnet/aot 9.0.301
csharp 6-m.cs 193ms 6.1ms 57.7MB 283ms 30ms dotnet 9.0.301
csharp 6-m.cs 203ms 4.9ms 59.6MB 390ms 23ms mono 6.12.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 36ms 0.2ms 2.8MB 30ms 0ms zig 0.14.1
csharp 2.cs 99ms 0.6ms 9.8MB 90ms 0ms dotnet/aot 9.0.301
csharp 2.cs 147ms 1.2ms 22.9MB 133ms 0ms mono 6.12.0
csharp 2.cs 251ms 1.5ms 29.5MB 233ms 10ms dotnet 9.0.301
csharp 1.cs 1064ms 15ms 13.0MB 1043ms 3ms dotnet/aot 9.0.301
csharp 1.cs 1315ms 11ms 32.8MB 1303ms 17ms dotnet 9.0.301
csharp 1.cs 3373ms 24ms 45.5MB 3323ms 40ms mono 6.12.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 90ms 0.4ms 2.8MB 80ms 0ms zig 0.14.1
csharp 2.cs 278ms 1.9ms 9.6MB 267ms 0ms dotnet/aot 9.0.301
csharp 2.cs 363ms 4.6ms 22.7MB 347ms 0ms mono 6.12.0
csharp 2.cs 406ms 2.7ms 29.4MB 390ms 10ms dotnet 9.0.301
csharp 1.cs 3124ms 12ms 13.5MB 3100ms 13ms dotnet/aot 9.0.301
csharp 1.cs 4086ms 597ms 33.3MB 4063ms 23ms dotnet 9.0.301
csharp 1.cs timeout 0.0ms 45.8MB 4940ms 50ms mono 6.12.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 14ms 0.1ms 1.3MB 10ms 0ms zig 0.14.1
csharp 2.cs 56ms 2.8ms 10.1MB 40ms 0ms dotnet/aot 9.0.301
csharp 2.cs 94ms 2.2ms 22.8MB 77ms 3ms mono 6.12.0
csharp 2.cs 174ms 3.0ms 29.6MB 150ms 10ms dotnet 9.0.301
csharp 1.cs 1631ms 16ms 32.4MB 1617ms 17ms dotnet 9.0.301
csharp 1.cs 1825ms 7.4ms 28.6MB 1813ms 0ms mono 6.12.0
csharp 1.cs 1831ms 2.3ms 12.9MB 1813ms 0ms dotnet/aot 9.0.301

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 249ms 1.1ms 4.1MB 240ms 0ms zig 0.14.1
csharp 4.cs 395ms 97ms 37.5MB 363ms 13ms dotnet 9.0.301
csharp 2.cs 569ms 58ms 39.7MB 540ms 17ms dotnet 9.0.301
csharp 1.cs 2043ms 15ms 36.7MB 2013ms 10ms dotnet 9.0.301
csharp 3.cs 2350ms 7.5ms 16.4MB 2333ms 0ms dotnet/aot 9.0.301
csharp 3.cs 2446ms 8.3ms 36.8MB 2423ms 7ms dotnet 9.0.301
csharp 1.cs 3943ms 49ms 16.3MB 3927ms 0ms dotnet/aot 9.0.301
csharp 1.cs timeout 0.0ms 22.4MB 4983ms 0ms mono 6.12.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 12ms 0.3ms 1.1MB 0ms 0ms zig 0.14.1
csharp 4.cs 86ms 4.5ms 34.5MB 60ms 10ms dotnet 9.0.301
csharp 3.cs 109ms 2.8ms 13.3MB 97ms 0ms dotnet/aot 9.0.301
csharp 2.cs 130ms 29ms 36.8MB 107ms 10ms dotnet 9.0.301
csharp 1.cs 143ms 2.9ms 33.5MB 120ms 13ms dotnet 9.0.301
csharp 3.cs 173ms 9.2ms 33.9MB 150ms 10ms dotnet 9.0.301
csharp 1.cs 176ms 7.9ms 12.8MB 163ms 0ms dotnet/aot 9.0.301
csharp 1.cs 571ms 4.4ms 23.4MB 557ms 3ms mono 6.12.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 551ms 10ms 119.2MB 507ms 87ms dotnet/aot 9.0.301
csharp 1.cs 630ms 2.9ms 147.3MB 580ms 127ms dotnet/aot 9.0.301
csharp 2.cs 714ms 12ms 136.7MB 647ms 93ms dotnet 9.0.301
csharp 1.cs 753ms 7.5ms 167.4MB 700ms 133ms dotnet 9.0.301
zig 1.zig 877ms 11ms 41.0MB 850ms 13ms zig 0.14.1
csharp 1.cs 1373ms 35ms 139.5MB 1567ms 183ms mono 6.12.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 139ms 5.9ms 57.8MB 110ms 33ms dotnet/aot 9.0.301
csharp 1.cs 163ms 8.0ms 72.7MB 123ms 50ms dotnet/aot 9.0.301
zig 1.zig 178ms 3.0ms 11.0MB 163ms 0ms zig 0.14.1
csharp 2.cs 267ms 8.1ms 75.7MB 220ms 40ms dotnet 9.0.301
csharp 1.cs 276ms 1.5ms 89.7MB 243ms 53ms dotnet 9.0.301
csharp 1.cs 277ms 2.7ms 69.5MB 250ms 37ms mono 6.12.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 3.zig 198ms 1.0ms 1.0MB 190ms 0ms zig 0.14.1
zig 2.zig 279ms 0.3ms 1.0MB 270ms 0ms zig 0.14.1
zig 1.zig 315ms 1.5ms 1.1MB 307ms 0ms zig 0.14.1
csharp 9.cs 365ms 5.3ms 27.6MB 343ms 10ms dotnet 9.0.301
csharp 8.cs 373ms 3.5ms 9.8MB 360ms 0ms dotnet/aot 9.0.301
csharp 8.cs 425ms 6.0ms 27.6MB 410ms 7ms dotnet 9.0.301
csharp 8.cs 1248ms 2.0ms 20.3MB 1230ms 0ms mono 6.12.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 3.zig 22ms 0.1ms 1.0MB 10ms 0ms zig 0.14.1
zig 2.zig 30ms 0.0ms 1.0MB 20ms 0ms zig 0.14.1
zig 1.zig 33ms 0.1ms 1.1MB 30ms 0ms zig 0.14.1
csharp 8.cs 46ms 1.5ms 9.9MB 30ms 0ms dotnet/aot 9.0.301
csharp 8.cs 97ms 3.2ms 27.5MB 77ms 7ms dotnet 9.0.301
csharp 9.cs 99ms 5.9ms 27.9MB 73ms 10ms dotnet 9.0.301
csharp 8.cs 168ms 3.1ms 22.4MB 153ms 0ms mono 6.12.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 274ms 3.8ms 40.2MB 257ms 0ms zig 0.14.1
zig 2.zig 325ms 2.5ms 6.0MB 313ms 0ms zig 0.14.1
csharp 1.cs 361ms 7.5ms 96.3MB 333ms 17ms dotnet 9.0.301
csharp 1.cs 379ms 11ms 78.8MB 360ms 7ms dotnet/aot 9.0.301
csharp 2.cs 399ms 4.3ms 35.7MB 377ms 10ms dotnet 9.0.301
csharp 2.cs 423ms 2.5ms 17.5MB 410ms 0ms dotnet/aot 9.0.301
csharp 1.cs 584ms 14ms 83.9MB 560ms 10ms mono 6.12.0
csharp 2.cs 1886ms 26ms 29.8MB 1870ms 3ms mono 6.12.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 50ms 2.9ms 10.9MB 40ms 0ms zig 0.14.1
csharp 1.cs 65ms 1.9ms 24.8MB 50ms 0ms dotnet/aot 9.0.301
zig 2.zig 81ms 0.8ms 2.3MB 70ms 0ms zig 0.14.1
csharp 1.cs 104ms 4.5ms 42.6MB 80ms 10ms dotnet 9.0.301
csharp 2.cs 110ms 2.4ms 12.1MB 100ms 0ms dotnet/aot 9.0.301
csharp 2.cs 129ms 3.8ms 30.1MB 110ms 7ms dotnet 9.0.301
csharp 1.cs 148ms 0.4ms 36.3MB 130ms 7ms mono 6.12.0
csharp 2.cs 487ms 4.8ms 21.1MB 473ms 0ms mono 6.12.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 2453ms 3.5ms 2.2MB 2427ms 17ms zig 0.14.1
csharp 1.cs 3272ms 12ms 13.9MB 3167ms 100ms dotnet/aot 9.0.301
csharp 1.cs 3667ms 43ms 38.1MB 3650ms 133ms dotnet 9.0.301

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 564ms 2.2ms 1.8MB 553ms 0ms zig 0.14.1
csharp 1.cs 767ms 3.0ms 13.5MB 727ms 27ms dotnet/aot 9.0.301
csharp 1.cs 1011ms 7.1ms 37.6MB 1100ms 37ms dotnet 9.0.301

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 1871ms 1.6ms 10.5MB 7320ms 3ms dotnet/aot 9.0.301
csharp 3-m.cs 1923ms 1.9ms 30.0MB 7370ms 10ms dotnet 9.0.301
zig 1.zig 3691ms 6.4ms 1.4MB 3683ms 0ms zig 0.14.1
csharp 3-m.cs 4682ms 158ms 27.7MB 17883ms 23ms mono 6.12.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 488ms 17ms 10.5MB 1800ms 0ms dotnet/aot 9.0.301
csharp 3-m.cs 632ms 70ms 29.9MB 1737ms 20ms dotnet 9.0.301
zig 1.zig 925ms 2.3ms 1.3MB 913ms 0ms zig 0.14.1
csharp 3-m.cs 1186ms 38ms 25.3MB 4467ms 7ms mono 6.12.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 136ms 11ms 10.5MB 447ms 7ms dotnet/aot 9.0.301
zig 1.zig 233ms 1.3ms 1.3MB 223ms 0ms zig 0.14.1
csharp 3-m.cs 252ms 16ms 28.8MB 463ms 13ms dotnet 9.0.301
csharp 3-m.cs 345ms 3.8ms 27.6MB 1160ms 10ms mono 6.12.0