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.

Nim 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.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 1224ms 7.0ms 35.9MB 1200ms 7ms nim 2.2.4
nim 2.nim 1502ms 17ms 35.0MB 1483ms 3ms nim/clang 2.2.4
d 1.d 2842ms 6.4ms 312.7MB 2810ms 20ms ldc2 1.43.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 117ms 20ms 7.3MB 95ms 0ms nim 2.2.4
nim 2.nim 124ms 5.3ms 5.9MB 110ms 0ms nim/clang 2.2.4
d 1.d 304ms 39ms 209.6MB 270ms 20ms ldc2 1.43.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 6.nim 855ms 23ms 4.7MB 837ms 0ms nim 2.2.4
nim 6.nim 932ms 9.4ms 3.0MB 920ms 0ms nim/clang 2.2.4
nim 5.nim 7274ms 50ms 8.1MB 7223ms 30ms nim 2.2.4
nim 5.nim 8047ms 172ms 6.4MB 7997ms 33ms nim/clang 2.2.4
nim 3.nim 26905ms 184ms 11.5MB 26857ms 27ms nim/clang 2.2.4
nim 3.nim 27665ms 109ms 14.5MB 27613ms 30ms nim 2.2.4
d 1.d 36420ms 328ms 25.7MB 36310ms 93ms ldc2 1.43.0
nim 1.nim 107046ms 771ms 2036.8MB 71373ms 33600ms nim/clang 2.2.4
nim 1.nim 108677ms 212ms 2036.9MB 72837ms 33773ms nim 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 6.nim 57ms 2.7ms 3.6MB 47ms 0ms nim 2.2.4
nim 6.nim 65ms 0.3ms 1.9MB 53ms 0ms nim/clang 2.2.4
nim 5.nim 417ms 4.9ms 4.6MB 403ms 0ms nim 2.2.4
nim 5.nim 474ms 9.7ms 2.9MB 460ms 0ms nim/clang 2.2.4
nim 3.nim 1171ms 6.6ms 6.0MB 1163ms 0ms nim 2.2.4
nim 3.nim 1197ms 26ms 3.8MB 1187ms 0ms nim/clang 2.2.4
d 1.d 1418ms 8.4ms 8.6MB 1397ms 3ms ldc2 1.43.0
nim 1.nim 5324ms 41ms 522.5MB 3093ms 1793ms nim 2.2.4
nim 1.nim 5430ms 115ms 518.9MB 3183ms 1807ms nim/clang 2.2.4

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 252ms 0.3ms 1.4MB 240ms 0ms nim/clang 2.2.4
nim 2.nim 252ms 8.0ms 2.0MB 233ms 0ms nim 2.2.4
d 1.d 254ms 5.5ms 1.7MB 240ms 0ms ldc2 1.43.0
nim 1.nim 606ms 6.1ms 1.3MB 500ms 90ms nim/clang 2.2.4
nim 1.nim 644ms 18ms 2.1MB 523ms 107ms nim 2.2.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 29ms 2.1ms 1.4MB 20ms 0ms nim/clang 2.2.4
d 1.d 30ms 3.8ms 1.7MB 23ms 0ms ldc2 1.43.0
nim 2.nim 31ms 3.8ms 2.1MB 23ms 0ms nim 2.2.4
nim 1.nim 66ms 1.5ms 2.1MB 50ms 0ms nim 2.2.4
nim 1.nim 76ms 15ms 1.3MB 57ms 7ms nim/clang 2.2.4

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1.5ms 0.1ms 1.3MB 0ms 0ms nim/clang 2.2.4
d 1.d 2.4ms 0.4ms 3.2MB 0ms 0ms ldc2 1.43.0
nim 1.nim 2.5ms 0.5ms 2.1MB 0ms 0ms nim 2.2.4

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 149ms 2.1ms 6.8MB 143ms 0ms ldc2 1.43.0
nim 2.nim 152ms 2.4ms 1.4MB 143ms 0ms nim/clang 2.2.4
nim 2.nim 154ms 7.7ms 3.5MB 143ms 0ms nim 2.2.4
nim 1.nim 10570ms 78ms 2.1MB 10560ms 0ms nim 2.2.4
nim 1.nim 14012ms 275ms 1.4MB 13997ms 0ms nim/clang 2.2.4

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 437ms 6.1ms 7.9MB 440ms 0ms ldc2 1.43.0
nim 2.nim 446ms 5.0ms 3.5MB 437ms 0ms nim 2.2.4
nim 2.nim 449ms 4.0ms 1.3MB 437ms 0ms nim/clang 2.2.4
nim 1.nim 31568ms 105ms 2.1MB 31553ms 0ms nim 2.2.4
nim 1.nim 42854ms 1115ms 1.4MB 42840ms 0ms nim/clang 2.2.4

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 66ms 3.1ms 6.1MB 57ms 0ms ldc2 1.43.0
nim 2.nim 67ms 0.6ms 1.4MB 60ms 0ms nim/clang 2.2.4
nim 2.nim 68ms 2.3ms 2.1MB 60ms 0ms nim 2.2.4
nim 1.nim 535ms 9.4ms 2.1MB 523ms 0ms nim 2.2.4
nim 1.nim 689ms 8.3ms 1.3MB 677ms 0ms nim/clang 2.2.4

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 511ms 11ms 7.1MB 500ms 0ms ldc2 1.43.0
nim 1.nim 557ms 8.5ms 4.5MB 543ms 0ms nim/clang 2.2.4
nim 1.nim 1366ms 3.0ms 6.4MB 1350ms 0ms nim 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 26ms 0.4ms 1.4MB 20ms 0ms nim/clang 2.2.4
d 1.d 26ms 2.0ms 1.7MB 17ms 0ms ldc2 1.43.0
nim 1.nim 62ms 2.4ms 3.7MB 50ms 0ms nim 2.2.4

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 790ms 8.4ms 36.7MB 777ms 3ms nim 2.2.4
nim 1.nim 970ms 6.2ms 35.1MB 950ms 7ms nim/clang 2.2.4
d 1.d 1511ms 7.3ms 312.8MB 1477ms 30ms ldc2 1.43.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 143ms 4.6ms 11.5MB 123ms 0ms nim 2.2.4
nim 1.nim 183ms 6.8ms 9.5MB 170ms 0ms nim/clang 2.2.4
d 1.d 323ms 3.5ms 312.6MB 277ms 37ms ldc2 1.43.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 494ms 1.4ms 2.1MB 480ms 0ms nim 2.2.4
nim 2.nim 542ms 9.6ms 1.4MB 530ms 0ms nim/clang 2.2.4
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
nim 2.nim 55ms 2.9ms 2.1MB 47ms 0ms nim 2.2.4
nim 2.nim 58ms 1.0ms 1.3MB 50ms 0ms nim/clang 2.2.4
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
nim 1.nim 954ms 6.1ms 42.7MB 937ms 0ms nim 2.2.4
nim 1.nim 965ms 5.0ms 40.8MB 943ms 0ms nim/clang 2.2.4
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
nim 1.nim 168ms 0.9ms 12.9MB 160ms 0ms nim 2.2.4
d 1.d 171ms 1.6ms 14.1MB 157ms 0ms ldc2 1.43.0
nim 1.nim 175ms 5.7ms 11.8MB 163ms 0ms nim/clang 2.2.4
d 2.d 236ms 2.0ms 15.3MB 220ms 0ms ldc2 1.43.0

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 3.d 806ms 71ms 170.2MB 1080ms 30ms ldc2 1.43.0
nim 1.nim 2134ms 7.6ms 151.9MB 2093ms 20ms nim/clang 2.2.4
nim 1.nim 2191ms 42ms 153.8MB 2157ms 13ms nim 2.2.4

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 3.d 82ms 1.9ms 22.4MB 93ms 3ms ldc2 1.43.0
nim 1.nim 222ms 3.8ms 16.8MB 203ms 0ms nim/clang 2.2.4
nim 1.nim 224ms 0.6ms 18.4MB 203ms 7ms nim 2.2.4

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 11029ms 35ms 1.3MB 11017ms 0ms nim/clang 2.2.4
nim 1.nim 11039ms 7.6ms 3.4MB 11027ms 0ms nim 2.2.4
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
nim 1.nim 2764ms 2.5ms 1.4MB 2753ms 0ms nim/clang 2.2.4
nim 1.nim 2767ms 4.2ms 2.1MB 2753ms 0ms nim 2.2.4
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
nim 1.nim 695ms 0.3ms 1.3MB 683ms 0ms nim/clang 2.2.4
nim 1.nim 696ms 2.1ms 2.1MB 687ms 0ms nim 2.2.4
d 1.d 701ms 11ms 3.2MB 693ms 0ms ldc2 1.43.0