Programming Language and compiler
Benchmarks

D VS Wasm benchmarks

Current benchmark data was generated on Tue Jul 01 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
wasm 5.rs 1766ms 30ms 36.0MB 1747ms 7ms wasmtime 34.0.1
wasm 4.rs 1838ms 15ms 34.0MB 1817ms 10ms wasmtime 34.0.1
wasm 3.rs 1880ms 33ms 50.0MB 1850ms 13ms wasmtime 34.0.1
d 1.d 2206ms 5.4ms 312.8MB 2170ms 43ms ldc2 1.41.0
d 1.d 3040ms 21ms 314.5MB 3210ms 57ms dmd 2.111.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 5.rs 167ms 1.1ms 20.1MB 150ms 0ms wasmtime 34.0.1
wasm 4.rs 174ms 1.7ms 20.0MB 160ms 3ms wasmtime 34.0.1
wasm 3.rs 179ms 2.1ms 22.1MB 163ms 0ms wasmtime 34.0.1
d 1.d 207ms 3.1ms 207.9MB 183ms 13ms ldc2 1.41.0
d 1.d 262ms 1.5ms 210.9MB 233ms 13ms dmd 2.111.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1111ms 16ms 20.4MB 1100ms 0ms wasmtime 34.0.1
d 1.d timeout 0.0ms 16.5MB 4957ms 30ms dmd 2.111.0
d 1.d timeout 0.0ms 16.6MB 4963ms 23ms ldc2 1.41.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 77ms 0.4ms 19.1MB 67ms 0ms wasmtime 34.0.1
d 1.d 1049ms 6.5ms 10.3MB 1020ms 17ms ldc2 1.41.0
d 1.d 1387ms 5.6ms 12.1MB 1367ms 10ms dmd 2.111.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 419ms 6.5ms 19.5MB 403ms 0ms wasmtime 34.0.1
d 1.d 2551ms 3.5ms 8.0MB 2540ms 0ms ldc2 1.41.0
d 1.d 2871ms 10ms 10.5MB 2860ms 0ms dmd 2.111.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 113ms 0.1ms 19.0MB 100ms 0ms wasmtime 34.0.1
d 1.d 444ms 2.0ms 8.1MB 437ms 0ms ldc2 1.41.0
d 1.d 517ms 1.2ms 10.5MB 510ms 0ms dmd 2.111.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 373ms 5.6ms 3.1MB 1427ms 0ms ldc2 1.41.0
d 2-im.d 1114ms 9.3ms 3.0MB 4320ms 0ms ldc2 1.41.0
d 1-i.d 1488ms 1.7ms 2.9MB 1480ms 0ms ldc2 1.41.0
d 1.d 3143ms 19ms 2.9MB 3130ms 0ms ldc2 1.41.0
d 2-i.d 3232ms 3.6ms 2.9MB 3223ms 0ms ldc2 1.41.0
d 1.d 3544ms 3.7ms 4.6MB 3533ms 0ms dmd 2.111.0
wasm 1.rs 4201ms 47ms 18.3MB 4190ms 0ms wasmtime 34.0.1
d 1-im.d 4461ms 9.7ms 5.3MB 17560ms 0ms dmd 2.111.0
d 1-i.d timeout 0.0ms 4.6MB 4990ms 0ms dmd 2.111.0
d 2-i.d timeout 0.0ms 4.6MB 4990ms 0ms dmd 2.111.0
d 2-im.d timeout 0.0ms 4.9MB 19740ms 20ms dmd 2.111.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 36ms 0.9ms 3.1MB 110ms 0ms ldc2 1.41.0
d 2-im.d 98ms 1.6ms 3.0MB 347ms 0ms ldc2 1.41.0
d 1-i.d 124ms 0.3ms 2.9MB 120ms 0ms ldc2 1.41.0
d 1.d 265ms 3.5ms 2.9MB 257ms 0ms ldc2 1.41.0
d 2-i.d 266ms 1.0ms 2.9MB 260ms 0ms ldc2 1.41.0
d 1.d 300ms 2.1ms 4.6MB 290ms 0ms dmd 2.111.0
wasm 1.rs 349ms 0.3ms 18.3MB 337ms 0ms wasmtime 34.0.1
d 1-im.d 402ms 34ms 4.8MB 1410ms 0ms dmd 2.111.0
d 2-im.d 524ms 3.0ms 4.9MB 2003ms 0ms dmd 2.111.0
d 1-i.d 887ms 8.9ms 4.5MB 877ms 0ms dmd 2.111.0
d 2-i.d 1393ms 4.6ms 4.5MB 1383ms 0ms dmd 2.111.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 109ms 0.2ms 2.9MB 100ms 0ms ldc2 1.41.0
wasm 1.rs 235ms 3.7ms 18.2MB 220ms 0ms wasmtime 34.0.1
d 1.d 641ms 3.8ms 4.9MB 630ms 0ms dmd 2.111.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 14ms 1.5ms 3.0MB 10ms 0ms ldc2 1.41.0
wasm 1.rs 32ms 1.2ms 18.2MB 20ms 0ms wasmtime 34.0.1
d 1.d 68ms 0.9ms 4.8MB 60ms 0ms dmd 2.111.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 1.7ms 0.1ms 3.0MB 0ms 0ms ldc2 1.41.0
d 1.d 2.2ms 0.1ms 5.1MB 0ms 0ms dmd 2.111.0
wasm 1.rs 6.7ms 0.5ms 18.3MB 0ms 0ms wasmtime 34.0.1

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 59ms 1.7ms 15.7MB 63ms 7ms ldc2 1.41.0
d 2.d 241ms 3.0ms 22.5MB 247ms 3ms dmd 2.111.0

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 483ms 11ms 140.4MB 450ms 37ms ldc2 1.41.0
d 2.d 2474ms 16ms 158.3MB 2490ms 33ms dmd 2.111.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-m.d 713ms 31ms 47.5MB 2403ms 10ms ldc2 1.41.0
d 1-m.d 2035ms 101ms 50.6MB 6757ms 17ms dmd 2.111.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-m.d 100ms 4.7ms 39.5MB 263ms 10ms ldc2 1.41.0
d 1-m.d 257ms 16ms 41.0MB 737ms 17ms dmd 2.111.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 90ms 1.3ms 18.5MB 80ms 0ms wasmtime 34.0.1
d 1.d 130ms 1.9ms 5.9MB 120ms 0ms ldc2 1.41.0
d 1.d 178ms 3.2ms 7.9MB 167ms 3ms dmd 2.111.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 253ms 2.7ms 17.9MB 240ms 0ms wasmtime 34.0.1
d 1.d 385ms 2.3ms 5.9MB 370ms 17ms ldc2 1.41.0
d 1.d 520ms 2.3ms 7.9MB 513ms 13ms dmd 2.111.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 47ms 1.0ms 17.7MB 33ms 0ms wasmtime 34.0.1
d 1.d 58ms 1.2ms 5.9MB 50ms 0ms ldc2 1.41.0
d 1.d 79ms 1.3ms 8.1MB 67ms 0ms dmd 2.111.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 367ms 0.5ms 7.5MB 360ms 0ms ldc2 1.41.0
wasm 8.rs 828ms 2.0ms 21.5MB 817ms 0ms wasmtime 34.0.1
d 1.d 2120ms 5.9ms 9.4MB 2107ms 0ms dmd 2.111.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 18ms 0.4ms 3.0MB 10ms 0ms ldc2 1.41.0
wasm 8.rs 43ms 0.2ms 18.4MB 30ms 0ms wasmtime 34.0.1
d 1.d 93ms 2.8ms 4.9MB 87ms 0ms dmd 2.111.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 886ms 12ms 44.1MB 863ms 10ms wasmtime 34.0.1
d 1.d 1134ms 3.1ms 312.6MB 1097ms 40ms ldc2 1.41.0
d 1.d 1870ms 15ms 314.9MB 2007ms 47ms dmd 2.111.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 193ms 1.1ms 24.1MB 177ms 3ms wasmtime 34.0.1
d 1.d 232ms 1.5ms 312.8MB 190ms 30ms ldc2 1.41.0
d 1.d 361ms 4.2ms 314.8MB 330ms 30ms dmd 2.111.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 361ms 1.2ms 2.9MB 350ms 0ms ldc2 1.41.0
d 2.d 361ms 0.9ms 2.9MB 350ms 0ms ldc2 1.41.0
wasm 1.rs 404ms 3.4ms 18.0MB 390ms 0ms wasmtime 34.0.1
wasm 2.rs 562ms 0.4ms 18.3MB 550ms 0ms wasmtime 34.0.1
d 1.d 677ms 14ms 4.8MB 667ms 0ms dmd 2.111.0
d 2.d 2033ms 5.4ms 4.8MB 2023ms 0ms dmd 2.111.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 39ms 0.6ms 2.9MB 30ms 0ms ldc2 1.41.0
d 2.d 39ms 0.7ms 2.9MB 30ms 0ms ldc2 1.41.0
wasm 1.rs 49ms 1.1ms 18.1MB 37ms 0ms wasmtime 34.0.1
wasm 2.rs 65ms 1.1ms 18.1MB 50ms 0ms wasmtime 34.0.1
d 1.d 71ms 1.2ms 4.6MB 60ms 0ms dmd 2.111.0
d 2.d 210ms 1.7ms 4.8MB 200ms 0ms dmd 2.111.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 344ms 7.7ms 45.7MB 323ms 7ms ldc2 1.41.0
d 1.d 385ms 4.2ms 79.2MB 370ms 0ms dmd 2.111.0
wasm 2.rs 391ms 3.6ms 23.0MB 377ms 0ms wasmtime 34.0.1
wasm 1.rs 526ms 14ms 57.2MB 510ms 0ms wasmtime 34.0.1
d 2.d 854ms 0.6ms 49.7MB 833ms 10ms ldc2 1.41.0
d 2.d 1168ms 1.5ms 49.3MB 1150ms 10ms dmd 2.111.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 63ms 4.3ms 15.7MB 53ms 0ms ldc2 1.41.0
d 1.d 78ms 3.7ms 25.3MB 67ms 0ms dmd 2.111.0
wasm 1.rs 94ms 2.6ms 27.8MB 80ms 0ms wasmtime 34.0.1
wasm 2.rs 100ms 2.9ms 19.5MB 90ms 0ms wasmtime 34.0.1
d 2.d 211ms 1.2ms 17.8MB 200ms 0ms ldc2 1.41.0
d 2.d 297ms 1.9ms 19.7MB 280ms 0ms dmd 2.111.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 2137ms 4.5ms 19.2MB 2123ms 0ms wasmtime 34.0.1
d 1.d 2454ms 24ms 8.0MB 2420ms 417ms ldc2 1.41.0
d 1.d 4480ms 3.9ms 10.5MB 4400ms 500ms dmd 2.111.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 509ms 3.9ms 18.3MB 493ms 0ms wasmtime 34.0.1
d 1.d 587ms 3.4ms 8.1MB 567ms 103ms ldc2 1.41.0
d 1.d 1068ms 6.3ms 10.4MB 1033ms 127ms dmd 2.111.0

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 3.d 584ms 5.1ms 172.3MB 770ms 20ms ldc2 1.41.0
d 3.d 1204ms 8.1ms 177.4MB 1390ms 27ms dmd 2.111.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 3.d 63ms 1.5ms 28.5MB 70ms 0ms ldc2 1.41.0
d 3.d 126ms 0.1ms 31.6MB 133ms 3ms dmd 2.111.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 3428ms 13ms 17.9MB 3413ms 0ms wasmtime 34.0.1
d 1.d 4780ms 18ms 4.1MB 4747ms 363ms ldc2 1.41.0
d 1.d timeout 0.0ms 6.5MB 4950ms 303ms dmd 2.111.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 880ms 8.0ms 18.5MB 867ms 0ms wasmtime 34.0.1
d 1.d 1200ms 1.8ms 3.9MB 1177ms 93ms ldc2 1.41.0
d 1.d 2059ms 9.1ms 6.5MB 2030ms 123ms dmd 2.111.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 3599ms 3.4ms 4.0MB 3590ms 0ms ldc2 1.41.0
wasm 2.rs 3600ms 5.7ms 18.3MB 3587ms 0ms wasmtime 34.0.1
d 1.d 3649ms 20ms 5.9MB 3640ms 0ms dmd 2.111.0
wasm 7.rs 4895ms 4.2ms 18.3MB 4883ms 0ms wasmtime 34.0.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 903ms 2.0ms 3.5MB 893ms 0ms ldc2 1.41.0
wasm 2.rs 907ms 0.5ms 17.7MB 893ms 0ms wasmtime 34.0.1
d 1.d 917ms 3.9ms 5.3MB 907ms 0ms dmd 2.111.0
wasm 7.rs 1230ms 1.2ms 17.7MB 1220ms 0ms wasmtime 34.0.1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 229ms 1.7ms 3.1MB 220ms 0ms ldc2 1.41.0
d 1.d 233ms 0.2ms 5.0MB 220ms 0ms dmd 2.111.0
wasm 2.rs 234ms 1.4ms 17.6MB 220ms 0ms wasmtime 34.0.1
wasm 7.rs 316ms 0.4ms 18.1MB 303ms 0ms wasmtime 34.0.1