Programming Language and compiler
Benchmarks

Results for 38 of 40 languages from this run on actest1.

Unavailable in this run: Hack, Lisp. Follow the run link for failure details.

C VS D benchmarks

Current benchmark data was generated on Sun Sep 27 2026, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][4 cores] Intel(R) Core(TM) i7-3687U CPU @ 2.10GHz (Model 58)

* -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.)

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 1.7ms 0.2ms 1.1MB 0ms 0ms gcc 13.3.0
c 1.c 1.8ms 0.3ms 1.6MB 0ms 0ms clang 18.1.3
d 1.d 2.4ms 0.4ms 3.2MB 0ms 0ms ldc2 1.43.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 430ms 18ms 23.7MB 927ms 10ms gcc 13.3.0
c 1-m.c 605ms 36ms 25.9MB 1863ms 40ms clang 18.1.3
d 1-m.d 1028ms 32ms 44.3MB 3027ms 13ms ldc2 1.43.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 59ms 8.2ms 13.2MB 103ms 3ms gcc 13.3.0
c 1-m.c 83ms 7.5ms 17.0MB 267ms 7ms clang 18.1.3
d 1-m.d 136ms 9.7ms 37.2MB 347ms 3ms ldc2 1.43.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 293ms 24ms 7.4MB 1010ms 20ms clang 18.1.3
c 1-ffi.c 438ms 34ms 6.5MB 423ms 0ms clang 18.1.3
d 1.d 511ms 11ms 7.1MB 500ms 0ms ldc2 1.43.0
c 1-mffi.c 516ms 3.0ms 6.3MB 1540ms 0ms gcc 13.3.0
c 1-ffi.c 1010ms 20ms 5.9MB 997ms 0ms gcc 13.3.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 18ms 2.0ms 6.8MB 37ms 0ms clang 18.1.3
c 1-ffi.c 23ms 2.8ms 2.6MB 10ms 0ms clang 18.1.3
d 1.d 26ms 2.0ms 1.7MB 17ms 0ms ldc2 1.43.0
c 1-mffi.c 30ms 5.0ms 2.2MB 63ms 0ms gcc 13.3.0
c 1-ffi.c 45ms 0.5ms 2.3MB 33ms 0ms gcc 13.3.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 393ms 4.7ms 1.1MB 387ms 0ms gcc 13.3.0
c 5.c 483ms 1.6ms 1.5MB 470ms 0ms clang 18.1.3
c 2.c 520ms 1.4ms 1.0MB 510ms 0ms gcc 13.3.0
c 5.c 541ms 2.5ms 1.1MB 530ms 0ms gcc 13.3.0
c 2.c 549ms 1.2ms 1.5MB 540ms 0ms clang 18.1.3
c 8-i.c 555ms 0.8ms 1.5MB 550ms 0ms clang 18.1.3
d 1.d 592ms 1.6ms 1.6MB 577ms 0ms ldc2 1.43.0
d 2.d 594ms 2.9ms 1.7MB 583ms 0ms ldc2 1.43.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 42ms 1.4ms 1.1MB 30ms 0ms gcc 13.3.0
c 5.c 52ms 1.1ms 1.5MB 40ms 0ms clang 18.1.3
c 2.c 55ms 0.3ms 1.1MB 50ms 0ms gcc 13.3.0
c 5.c 59ms 2.8ms 1.1MB 50ms 0ms gcc 13.3.0
c 2.c 59ms 1.7ms 1.5MB 50ms 0ms clang 18.1.3
c 8-i.c 61ms 3.7ms 1.5MB 53ms 0ms clang 18.1.3
d 1.d 64ms 0.8ms 1.7MB 50ms 0ms ldc2 1.43.0
d 2.d 75ms 2.5ms 1.8MB 63ms 0ms ldc2 1.43.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 966ms 2.5ms 40.8MB 943ms 7ms clang 18.1.3
c 1.c 967ms 2.3ms 40.3MB 943ms 7ms gcc 13.3.0
d 1.d 967ms 5.7ms 43.2MB 943ms 10ms ldc2 1.43.0
d 2.d 1100ms 6.3ms 48.1MB 1080ms 0ms ldc2 1.43.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 168ms 1.1ms 11.1MB 153ms 0ms gcc 13.3.0
c 1.c 169ms 2.0ms 11.6MB 157ms 0ms clang 18.1.3
d 1.d 171ms 1.6ms 14.1MB 157ms 0ms ldc2 1.43.0
d 2.d 236ms 2.0ms 15.3MB 220ms 0ms ldc2 1.43.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 6-im.c 1696ms 2.3ms 5.2MB 6667ms 17ms clang 18.1.3
c 6-im.c 1825ms 12ms 2.1MB 7167ms 0ms gcc 13.3.0
c 4-m.c 2992ms 24ms 5.2MB 11847ms 10ms clang 18.1.3
c 4-m.c 3065ms 33ms 2.4MB 12143ms 3ms gcc 13.3.0
c 5-im.c 3141ms 26ms 5.2MB 12413ms 10ms clang 18.1.3
c 5-im.c 3152ms 6.6ms 1.4MB 12477ms 0ms gcc 13.3.0
c 3-m.c 5834ms 6.1ms 3.3MB 23127ms 10ms clang 18.1.3
c 3-m.c 5845ms 11ms 1.4MB 23160ms 3ms gcc 13.3.0
d 1.d 11045ms 7.1ms 3.9MB 11033ms 0ms ldc2 1.43.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 6-im.c 435ms 3.9ms 3.3MB 1680ms 0ms clang 18.1.3
c 6-im.c 503ms 87ms 1.1MB 1907ms 0ms gcc 13.3.0
c 5-im.c 787ms 0.9ms 1.4MB 3087ms 0ms gcc 13.3.0
c 5-im.c 790ms 4.1ms 3.3MB 3097ms 0ms clang 18.1.3
c 4-m.c 790ms 73ms 3.2MB 3080ms 3ms clang 18.1.3
c 4-m.c 834ms 106ms 1.5MB 3233ms 0ms gcc 13.3.0
c 3-m.c 1463ms 1.5ms 1.4MB 5773ms 0ms gcc 13.3.0
c 3-m.c 1467ms 4.2ms 3.3MB 5757ms 0ms clang 18.1.3
d 1.d 2767ms 0.6ms 3.6MB 2760ms 0ms ldc2 1.43.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 6-im.c 116ms 0.7ms 5.6MB 420ms 7ms clang 18.1.3
c 6-im.c 123ms 0.3ms 3.1MB 453ms 0ms gcc 13.3.0
c 4-m.c 200ms 6.3ms 3.2MB 733ms 7ms clang 18.1.3
c 4-m.c 200ms 0.9ms 1.4MB 763ms 0ms gcc 13.3.0
c 5-im.c 202ms 2.1ms 5.2MB 753ms 3ms clang 18.1.3
c 5-im.c 208ms 3.0ms 1.4MB 790ms 0ms gcc 13.3.0
c 3-m.c 370ms 0.5ms 3.3MB 1430ms 0ms clang 18.1.3
c 3-m.c 371ms 0.9ms 1.5MB 1440ms 0ms gcc 13.3.0
d 1.d 701ms 11ms 3.2MB 693ms 0ms ldc2 1.43.0