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.

acton 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
acton 1-m.act 2140ms 43ms 38.5MB 3237ms 57ms acton 0.30.0
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
acton 1.act 217ms 5.2ms 9.6MB 273ms 10ms acton 0.30.0
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
acton 1-m.act 13727ms 447ms 7.8MB 18197ms 12690ms acton 0.30.0
d 1.d 36420ms 328ms 25.7MB 36310ms 93ms ldc2 1.43.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
acton 1-m.act 879ms 7.0ms 6.2MB 1110ms 823ms acton 0.30.0
d 1.d 1418ms 8.4ms 8.6MB 1397ms 3ms ldc2 1.43.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
acton 1.act 275ms 10ms 7.5MB 260ms 17ms acton 0.30.0
d 1.d 5463ms 8.6ms 8.0MB 5450ms 0ms ldc2 1.43.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
acton 1.act 94ms 15ms 5.5MB 83ms 7ms acton 0.30.0
d 1.d 920ms 1.5ms 7.4MB 907ms 0ms ldc2 1.43.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 2960ms 29ms 3.6MB 11460ms 7ms ldc2 1.43.0
d 1.d 3699ms 15ms 1.7MB 3687ms 0ms ldc2 1.43.0
d 2-im.d 4985ms 52ms 3.6MB 19437ms 3ms ldc2 1.43.0
d 1-i.d 5554ms 44ms 1.6MB 5540ms 0ms ldc2 1.43.0
d 2-i.d 9897ms 21ms 1.7MB 9883ms 0ms ldc2 1.43.0
acton 1.act 65939ms 148ms 5.6MB 75737ms 15533ms acton 0.30.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 254ms 4.0ms 3.8MB 907ms 0ms ldc2 1.43.0
d 1.d 307ms 4.0ms 1.6MB 293ms 0ms ldc2 1.43.0
d 2-im.d 408ms 2.5ms 3.6MB 1517ms 0ms ldc2 1.43.0
d 1-i.d 473ms 4.7ms 1.7MB 463ms 0ms ldc2 1.43.0
d 2-i.d 820ms 0.7ms 1.7MB 807ms 0ms ldc2 1.43.0
acton 1.act 4998ms 14ms 4.0MB 5640ms 1240ms acton 0.30.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 254ms 5.5ms 1.7MB 240ms 0ms ldc2 1.43.0
acton 1.act 5589ms 17ms 12.8MB 6087ms 410ms acton 0.30.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 30ms 3.8ms 1.7MB 23ms 0ms ldc2 1.43.0
acton 1.act 578ms 1.5ms 15.6MB 610ms 33ms acton 0.30.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 2.4ms 0.4ms 3.2MB 0ms 0ms ldc2 1.43.0
acton 1.act 4.5ms 1.1ms 3.8MB 0ms 0ms acton 0.30.0

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
acton 1-m.act 496ms 19ms 6.8MB 940ms 253ms acton 0.30.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
acton 1-m.act 117ms 12ms 6.6MB 170ms 33ms acton 0.30.0

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 95ms 1.7ms 15.9MB 103ms 0ms ldc2 1.43.0
acton 1.act 141ms 3.0ms 49.9MB 187ms 10ms acton 0.30.0

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
acton 1-m.act 907ms 66ms 339.4MB 1680ms 57ms acton 0.30.0
d 2.d 915ms 82ms 150.2MB 880ms 27ms ldc2 1.43.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-m.d 1028ms 32ms 44.3MB 3027ms 13ms ldc2 1.43.0
acton 1-m.act 87144ms 724ms 194.2MB 135057ms 717ms acton 0.30.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-m.d 136ms 9.7ms 37.2MB 347ms 3ms ldc2 1.43.0
acton 1-m.act 8692ms 20ms 74.4MB 13153ms 433ms acton 0.30.0

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
acton 1.act 1615ms 85ms 13.3MB 2107ms 187ms acton 0.30.0

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
acton 1.act 4706ms 236ms 6.1MB 6103ms 523ms acton 0.30.0

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
acton 1.act 828ms 11ms 11.9MB 893ms 213ms acton 0.30.0

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
acton 1.act 4758ms 11ms 13.7MB 5307ms 233ms acton 0.30.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 26ms 2.0ms 1.7MB 17ms 0ms ldc2 1.43.0
acton 1.act 211ms 5.6ms 12.3MB 213ms 20ms acton 0.30.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 1511ms 7.3ms 312.8MB 1477ms 30ms ldc2 1.43.0
acton 1.act 4999ms 46ms 83.6MB 6123ms 57ms acton 0.30.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 323ms 3.5ms 312.6MB 277ms 37ms ldc2 1.43.0
acton 1.act 1097ms 13ms 31.2MB 1333ms 33ms acton 0.30.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
acton 1.act 4728ms 31ms 6.0MB 5217ms 733ms acton 0.30.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
acton 1.act 478ms 5.0ms 12.1MB 517ms 73ms acton 0.30.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
acton 1.act 8124ms 92ms 725.4MB 10360ms 120ms acton 0.30.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
acton 1.act 1965ms 40ms 250.3MB 2377ms 47ms acton 0.30.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 3332ms 74ms 8.1MB 3360ms 47ms ldc2 1.43.0
acton 1-m.act 5009ms 46ms 14.3MB 6123ms 1420ms acton 0.30.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 792ms 3.6ms 8.1MB 790ms 10ms ldc2 1.43.0
acton 1.act 1277ms 11ms 7.7MB 1540ms 373ms acton 0.30.0

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
acton 1.act timeout (120s) — — — — acton 0.30.0

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
acton 1-m.act 12513ms 174ms 101.1MB 20447ms 570ms acton 0.30.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
acton 1.act 5761ms 42ms 4.0MB 6240ms 873ms acton 0.30.0
d 1.d 6977ms 15ms 4.0MB 6983ms 33ms ldc2 1.43.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
acton 1.act 1453ms 25ms 4.0MB 1557ms 220ms acton 0.30.0
d 1.d 1766ms 12ms 4.0MB 1760ms 3ms ldc2 1.43.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 11045ms 7.1ms 3.9MB 11033ms 0ms ldc2 1.43.0
acton 1-m.act 105769ms 1188ms 5.7MB 163880ms 10223ms acton 0.30.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 2767ms 0.6ms 3.6MB 2760ms 0ms ldc2 1.43.0
acton 1-m.act 26160ms 70ms 8.7MB 38903ms 3493ms acton 0.30.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 701ms 11ms 3.2MB 693ms 0ms ldc2 1.43.0
acton 1.act 6035ms 45ms 4.4MB 7950ms 1010ms acton 0.30.0