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.

Zig 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
d 1.d 2842ms 6.4ms 312.7MB 2810ms 20ms ldc2 1.43.0
zig 1.zig 2945ms 28ms 49.1MB 2920ms 7ms zig 0.14.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 280ms 53ms 7.1MB 240ms 0ms zig 0.14.1
d 1.d 304ms 39ms 209.6MB 270ms 20ms ldc2 1.43.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 5068ms 18ms 2.4MB 5030ms 20ms zig 0.14.1
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
zig 1.zig 841ms 12ms 2.0MB 823ms 3ms zig 0.14.1
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
zig 2-m.zig 833ms 6.5ms 1.5MB 3140ms 0ms zig 0.14.1
zig 3-i.zig 1413ms 43ms 1.1MB 1400ms 0ms zig 0.14.1
zig 1.zig 2763ms 12ms 1.1MB 2753ms 0ms zig 0.14.1
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

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 2-m.zig 77ms 2.6ms 1.5MB 243ms 0ms zig 0.14.1
zig 3-i.zig 124ms 4.7ms 1.1MB 113ms 0ms zig 0.14.1
zig 1.zig 239ms 3.8ms 1.1MB 227ms 0ms zig 0.14.1
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

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 138ms 0.5ms 1.1MB 127ms 0ms zig 0.14.1
d 1.d 254ms 5.5ms 1.7MB 240ms 0ms ldc2 1.43.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 17ms 1.2ms 1.1MB 10ms 0ms zig 0.14.1
d 1.d 30ms 3.8ms 1.7MB 23ms 0ms ldc2 1.43.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 1.3ms 0.5ms 1.1MB 0ms 0ms zig 0.14.1
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
zig 1-m.zig 798ms 15ms 66.9MB 2580ms 27ms zig 0.14.1
d 1-m.d 1028ms 32ms 44.3MB 3027ms 13ms ldc2 1.43.0
zig 1.zig 1043ms 10ms 26.3MB 1013ms 7ms zig 0.14.1

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1-m.zig 117ms 4.2ms 55.0MB 293ms 43ms zig 0.14.1
zig 1.zig 130ms 6.2ms 15.5MB 107ms 3ms zig 0.14.1
d 1-m.d 136ms 9.7ms 37.2MB 347ms 3ms ldc2 1.43.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 51ms 1.5ms 2.7MB 40ms 0ms zig 0.14.1
d 1.d 149ms 2.1ms 6.8MB 143ms 0ms ldc2 1.43.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 143ms 5.9ms 2.7MB 133ms 0ms zig 0.14.1
d 1.d 437ms 6.1ms 7.9MB 440ms 0ms ldc2 1.43.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 26ms 0.9ms 1.1MB 13ms 0ms zig 0.14.1
d 1.d 66ms 3.1ms 6.1MB 57ms 0ms ldc2 1.43.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 350ms 2.1ms 4.2MB 340ms 0ms zig 0.14.1
d 1.d 511ms 11ms 7.1MB 500ms 0ms ldc2 1.43.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 17ms 0.6ms 1.1MB 10ms 0ms zig 0.14.1
d 1.d 26ms 2.0ms 1.7MB 17ms 0ms ldc2 1.43.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 1494ms 63ms 41.2MB 1463ms 13ms zig 0.14.1
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
zig 1.zig 267ms 4.3ms 11.0MB 253ms 3ms zig 0.14.1
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
zig 3.zig 379ms 3.1ms 1.1MB 370ms 0ms zig 0.14.1
zig 2.zig 470ms 2.9ms 1.1MB 457ms 0ms zig 0.14.1
zig 1.zig 510ms 3.2ms 1.1MB 500ms 0ms zig 0.14.1
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
zig 3.zig 42ms 3.2ms 1.1MB 33ms 0ms zig 0.14.1
zig 2.zig 50ms 2.1ms 1.1MB 40ms 0ms zig 0.14.1
zig 1.zig 56ms 2.3ms 1.1MB 47ms 0ms zig 0.14.1
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
zig 2.zig 552ms 15ms 6.0MB 543ms 0ms zig 0.14.1
zig 1.zig 958ms 9.6ms 40.1MB 940ms 0ms zig 0.14.1
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
zig 2.zig 107ms 1.3ms 2.2MB 100ms 0ms zig 0.14.1
zig 1.zig 170ms 4.1ms 11.0MB 160ms 0ms zig 0.14.1
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

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
zig 1.zig 3461ms 6.4ms 2.3MB 3433ms 13ms zig 0.14.1

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
zig 1.zig 854ms 121ms 1.9MB 837ms 0ms zig 0.14.1

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
zig 1.zig 11057ms 6.2ms 1.1MB 11043ms 0ms zig 0.14.1

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
zig 1.zig 2773ms 1.4ms 1.1MB 2757ms 0ms zig 0.14.1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 697ms 1.0ms 1.1MB 690ms 0ms zig 0.14.1
d 1.d 701ms 11ms 3.2MB 693ms 0ms ldc2 1.43.0