Programming Language and compiler
Benchmarks

OCaml VS C# benchmarks

Current benchmark data was generated on Mon May 19 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 937ms 10ms 185.4MB 937ms 137ms dotnet 9.0.300
csharp 1.cs 1089ms 203ms 175.6MB 1003ms 140ms dotnet/aot 9.0.300
csharp 1.cs 1663ms 38ms 98.4MB 1863ms 183ms mono 6.12.0
ocaml 1.ml 3022ms 19ms 157.1MB 2943ms 60ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 142ms 2.5ms 44.0MB 123ms 10ms mono 6.12.0
csharp 1.cs 161ms 19ms 31.8MB 100ms 30ms dotnet/aot 9.0.300
csharp 1.cs 203ms 9.4ms 50.0MB 160ms 37ms dotnet 9.0.300
ocaml 1.ml 219ms 1.7ms 19.1MB 200ms 3ms ocaml 5.3.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 2919ms 5.3ms 4.9MB 2907ms 0ms ocaml 5.3.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 245ms 3.9ms 4.9MB 233ms 0ms ocaml 5.3.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5-m.cs 130ms 1.4ms 25.4MB 353ms 97ms dotnet/aot 9.0.300
csharp 5-m.cs 190ms 8.2ms 39.0MB 473ms 110ms dotnet 9.0.300
csharp 5-m.cs 239ms 13ms 49.4MB 680ms 103ms mono 6.12.0
ocaml 6.ml 346ms 1.0ms 24.9MB 333ms 0ms ocaml 5.3.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5-m.cs 25ms 1.5ms 16.1MB 33ms 17ms dotnet/aot 9.0.300
ocaml 6.ml 39ms 0.8ms 7.5MB 30ms 0ms ocaml 5.3.0
csharp 5-m.cs 62ms 2.0ms 37.3MB 87ms 17ms dotnet 9.0.300
csharp 5-m.cs 73ms 0.4ms 31.2MB 103ms 27ms mono 6.12.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 1.8ms 0.1ms 5.1MB 0ms 0ms ocaml 5.3.0
csharp 1.cs 7.5ms 2.9ms 9.6MB 0ms 0ms dotnet/aot 9.0.300
csharp 1.cs 32ms 1.0ms 23.9MB 20ms 2ms mono 6.12.0
csharp 1.cs 35ms 0.3ms 26.1MB 20ms 0ms dotnet 9.0.300

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 93ms 0.6ms 9.6MB 80ms 0ms dotnet/aot 9.0.300
csharp 2.cs 148ms 2.9ms 21.2MB 137ms 3ms mono 6.12.0
ocaml 1.ml 178ms 7.5ms 6.6MB 167ms 0ms ocaml 5.3.0
csharp 2.cs 255ms 4.3ms 29.5MB 233ms 10ms dotnet 9.0.300
csharp 1.cs 1040ms 5.1ms 13.3MB 1020ms 10ms dotnet/aot 9.0.300
csharp 1.cs 1302ms 18ms 33.1MB 1287ms 20ms dotnet 9.0.300
csharp 1.cs 3346ms 4.8ms 45.5MB 3297ms 40ms mono 6.12.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 263ms 3.9ms 9.8MB 247ms 0ms dotnet/aot 9.0.300
csharp 2.cs 378ms 23ms 22.6MB 360ms 0ms mono 6.12.0
csharp 2.cs 403ms 7.6ms 29.1MB 383ms 10ms dotnet 9.0.300
ocaml 1.ml 536ms 22ms 6.6MB 527ms 0ms ocaml 5.3.0
csharp 1.cs 3118ms 26ms 13.3MB 3090ms 13ms dotnet/aot 9.0.300
csharp 1.cs 3650ms 14ms 32.8MB 3633ms 17ms dotnet 9.0.300
csharp 1.cs timeout 0.0ms 45.6MB 4940ms 50ms mono 6.12.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 51ms 1.0ms 9.6MB 40ms 0ms dotnet/aot 9.0.300
ocaml 1.ml 77ms 1.7ms 5.9MB 70ms 0ms ocaml 5.3.0
csharp 2.cs 94ms 1.8ms 20.8MB 80ms 0ms mono 6.12.0
csharp 2.cs 166ms 3.5ms 29.5MB 150ms 3ms dotnet 9.0.300
csharp 1.cs 1616ms 3.8ms 32.5MB 1607ms 10ms dotnet 9.0.300
csharp 1.cs 1820ms 10ms 28.8MB 1803ms 0ms mono 6.12.0
csharp 1.cs 1824ms 6.5ms 13.0MB 1807ms 0ms dotnet/aot 9.0.300

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 537ms 11ms 121.0MB 490ms 90ms dotnet/aot 9.0.300
csharp 1.cs 614ms 11ms 143.3MB 563ms 120ms dotnet/aot 9.0.300
csharp 2.cs 684ms 6.9ms 136.2MB 630ms 97ms dotnet 9.0.300
csharp 1.cs 764ms 21ms 161.6MB 710ms 117ms dotnet 9.0.300
ocaml 1.ml 1089ms 3.3ms 70.2MB 1053ms 20ms ocaml 5.3.0
csharp 1.cs 1297ms 5.6ms 140.0MB 1507ms 167ms mono 6.12.0
ocaml 2.ml 2063ms 7.0ms 91.8MB 2010ms 40ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 137ms 9.3ms 57.3MB 110ms 30ms dotnet/aot 9.0.300
ocaml 1.ml 147ms 2.5ms 21.7MB 130ms 3ms ocaml 5.3.0
csharp 1.cs 158ms 4.3ms 74.7MB 120ms 50ms dotnet/aot 9.0.300
csharp 2.cs 262ms 6.1ms 75.2MB 227ms 37ms dotnet 9.0.300
csharp 1.cs 266ms 1.9ms 69.4MB 240ms 37ms mono 6.12.0
csharp 1.cs 272ms 2.6ms 88.1MB 243ms 53ms dotnet 9.0.300
ocaml 2.ml 366ms 7.2ms 27.6MB 343ms 10ms ocaml 5.3.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 9.cs 363ms 3.7ms 27.6MB 340ms 7ms dotnet 9.0.300
csharp 8.cs 372ms 0.9ms 9.8MB 360ms 0ms dotnet/aot 9.0.300
ocaml 1.ml 379ms 1.8ms 5.2MB 370ms 0ms ocaml 5.3.0
csharp 8.cs 423ms 2.3ms 27.6MB 403ms 3ms dotnet 9.0.300
csharp 8.cs 1252ms 5.3ms 22.4MB 1240ms 0ms mono 6.12.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 41ms 1.5ms 5.3MB 30ms 0ms ocaml 5.3.0
csharp 8.cs 46ms 0.5ms 9.8MB 30ms 0ms dotnet/aot 9.0.300
csharp 9.cs 93ms 1.5ms 27.8MB 73ms 10ms dotnet 9.0.300
csharp 8.cs 95ms 2.7ms 27.6MB 77ms 7ms dotnet 9.0.300
csharp 8.cs 162ms 0.3ms 22.8MB 150ms 0ms mono 6.12.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 325ms 6.5ms 78.7MB 307ms 3ms dotnet/aot 9.0.300
csharp 1.cs 361ms 8.4ms 96.1MB 333ms 13ms dotnet 9.0.300
csharp 2.cs 394ms 2.3ms 17.5MB 377ms 0ms dotnet/aot 9.0.300
csharp 2.cs 399ms 6.4ms 35.4MB 380ms 7ms dotnet 9.0.300
csharp 1.cs 560ms 6.0ms 82.0MB 540ms 10ms mono 6.12.0
ocaml 1.ml 940ms 9.1ms 541.2MB 883ms 43ms ocaml 5.3.0
ocaml 2.ml 1904ms 37ms 19.0MB 1893ms 0ms ocaml 5.3.0
csharp 2.cs 1908ms 73ms 29.5MB 1887ms 3ms mono 6.12.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 63ms 0.6ms 24.8MB 47ms 0ms dotnet/aot 9.0.300
csharp 1.cs 99ms 2.3ms 42.3MB 77ms 7ms dotnet 9.0.300
csharp 2.cs 102ms 1.9ms 11.9MB 90ms 0ms dotnet/aot 9.0.300
csharp 2.cs 129ms 0.7ms 29.9MB 113ms 7ms dotnet 9.0.300
csharp 1.cs 144ms 1.4ms 36.4MB 130ms 3ms mono 6.12.0
ocaml 1.ml 178ms 1.2ms 142.2MB 157ms 10ms ocaml 5.3.0
ocaml 2.ml 471ms 3.6ms 9.1MB 460ms 0ms ocaml 5.3.0
csharp 2.cs 494ms 11ms 21.5MB 480ms 0ms mono 6.12.0

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 6.cs 1758ms 15ms 418.7MB 1653ms 153ms dotnet/aot 9.0.300
csharp 5.cs 2138ms 7.7ms 443.4MB 2173ms 187ms dotnet 9.0.300
csharp 6.cs 2760ms 95ms 438.8MB 2717ms 170ms dotnet 9.0.300
csharp 5.cs 4264ms 20ms 419.0MB 4173ms 147ms dotnet/aot 9.0.300
ocaml 2.ml timeout 0.0ms 462.8MB 4830ms 157ms ocaml 5.3.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 6.cs 189ms 0.8ms 47.5MB 163ms 17ms dotnet/aot 9.0.300
csharp 5.cs 291ms 6.5ms 72.6MB 260ms 30ms dotnet 9.0.300
csharp 6.cs 396ms 4.6ms 70.3MB 357ms 33ms dotnet 9.0.300
csharp 5.cs 439ms 1.8ms 47.4MB 413ms 20ms dotnet/aot 9.0.300
ocaml 2.ml 549ms 15ms 57.1MB 513ms 23ms ocaml 5.3.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 1877ms 33ms 10.4MB 7243ms 3ms dotnet/aot 9.0.300
csharp 3-m.cs 1988ms 108ms 30.3MB 7253ms 20ms dotnet 9.0.300
ocaml 2.ml 4567ms 9.8ms 6.3MB 4560ms 0ms ocaml 5.3.0
csharp 3-m.cs 4713ms 116ms 24.7MB 18030ms 17ms mono 6.12.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 475ms 1.5ms 10.5MB 1810ms 0ms dotnet/aot 9.0.300
csharp 3-m.cs 535ms 3.2ms 30.1MB 1887ms 10ms dotnet 9.0.300
ocaml 2.ml 1147ms 4.8ms 6.1MB 1137ms 0ms ocaml 5.3.0
csharp 3-m.cs 1236ms 42ms 25.8MB 4650ms 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 128ms 1.5ms 10.5MB 450ms 0ms dotnet/aot 9.0.300
csharp 3-m.cs 176ms 1.1ms 28.5MB 503ms 10ms dotnet 9.0.300
ocaml 2.ml 295ms 7.0ms 5.2MB 287ms 0ms ocaml 5.3.0
csharp 3-m.cs 356ms 11ms 25.4MB 1197ms 3ms mono 6.12.0