Programming Language and compiler
Benchmarks

Rust VS OCaml benchmarks

Current benchmark data was generated on Mon Apr 14 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.)

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1.2ms 0.1ms 1.9MB 0ms 0ms rustc 1.86.0
rust 1.rs 1.2ms 0.1ms 1.8MB 0ms 0ms rustc 1.88.0-nightly
ocaml 1.ml 1.9ms 0.0ms 5.1MB 0ms 0ms ocaml 5.3.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 275ms 0.4ms 4.8MB 267ms 0ms rustc 1.88.0-nightly
rust 8.rs 293ms 2.0ms 4.8MB 283ms 0ms rustc 1.86.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 13ms 0.5ms 1.9MB 10ms 0ms rustc 1.88.0-nightly
rust 8.rs 14ms 0.2ms 1.9MB 10ms 0ms rustc 1.86.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 163ms 0.5ms 1.8MB 160ms 0ms rustc 1.86.0
rust 7-i.rs 237ms 0.9ms 1.8MB 230ms 0ms rustc 1.86.0
rust 1.rs 240ms 0.4ms 1.8MB 230ms 0ms rustc 1.86.0
rust 3.rs 279ms 0.7ms 1.9MB 270ms 0ms rustc 1.88.0-nightly
rust 2.rs 284ms 0.8ms 1.8MB 273ms 0ms rustc 1.86.0
ocaml 1.ml 374ms 1.4ms 5.3MB 363ms 0ms ocaml 5.3.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 18ms 0.1ms 1.8MB 10ms 0ms rustc 1.86.0
rust 7-i.rs 26ms 0.5ms 1.9MB 20ms 0ms rustc 1.86.0
rust 1.rs 26ms 0.2ms 1.8MB 20ms 0ms rustc 1.86.0
rust 3.rs 30ms 0.1ms 1.8MB 20ms 0ms rustc 1.88.0-nightly
rust 2.rs 31ms 0.2ms 1.8MB 20ms 0ms rustc 1.86.0
ocaml 1.ml 41ms 1.6ms 5.2MB 30ms 0ms ocaml 5.3.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 494ms 0.6ms 2.4MB 1910ms 3ms rustc 1.88.0-nightly
rust 7-m.rs 501ms 0.5ms 2.3MB 1937ms 3ms rustc 1.86.0
rust 8.rs 993ms 1.6ms 2.4MB 980ms 0ms rustc 1.88.0-nightly
rust 2-m.rs 1965ms 1.7ms 2.4MB 7730ms 7ms rustc 1.86.0
rust 7.rs 2063ms 2.7ms 2.0MB 2053ms 0ms rustc 1.86.0
rust 2.rs 4219ms 3.4ms 2.1MB 4207ms 0ms rustc 1.86.0
ocaml 2.ml 4555ms 3.1ms 6.3MB 4543ms 0ms ocaml 5.3.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 128ms 0.1ms 2.4MB 463ms 0ms rustc 1.88.0-nightly
rust 7-m.rs 130ms 0.6ms 2.3MB 473ms 0ms rustc 1.86.0
rust 8.rs 251ms 1.0ms 2.3MB 240ms 0ms rustc 1.88.0-nightly
rust 2-m.rs 495ms 0.3ms 2.1MB 1910ms 7ms rustc 1.86.0
rust 7.rs 521ms 1.8ms 1.8MB 510ms 0ms rustc 1.86.0
rust 2.rs 1059ms 1.2ms 1.9MB 1050ms 0ms rustc 1.86.0
ocaml 2.ml 1144ms 2.0ms 6.1MB 1137ms 0ms ocaml 5.3.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 35ms 0.4ms 2.1MB 110ms 0ms rustc 1.88.0-nightly
rust 7-m.rs 36ms 0.2ms 2.1MB 107ms 3ms rustc 1.86.0
rust 8.rs 65ms 1.0ms 2.0MB 57ms 0ms rustc 1.88.0-nightly
rust 2-m.rs 128ms 0.5ms 2.1MB 470ms 0ms rustc 1.86.0
rust 7.rs 133ms 2.1ms 1.9MB 127ms 0ms rustc 1.86.0
rust 2.rs 267ms 1.3ms 1.9MB 257ms 0ms rustc 1.86.0
ocaml 2.ml 294ms 3.8ms 5.2MB 287ms 0ms ocaml 5.3.0

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4.rs 1281ms 5.2ms 33.6MB 1260ms 7ms rustc 1.86.0
rust 5.rs 1344ms 1.4ms 33.8MB 1317ms 10ms rustc 1.86.0
rust 3.rs 1480ms 48ms 49.8MB 1450ms 13ms rustc 1.86.0
ocaml 1.ml 3140ms 30ms 157.0MB 3057ms 70ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4.rs 123ms 2.7ms 5.6MB 117ms 0ms rustc 1.86.0
rust 5.rs 127ms 1.9ms 5.8MB 120ms 0ms rustc 1.86.0
rust 3.rs 143ms 9.2ms 7.8MB 130ms 0ms rustc 1.86.0
ocaml 1.ml 226ms 2.6ms 19.2MB 210ms 0ms ocaml 5.3.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-m.rs 550ms 46ms 9.1MB 2070ms 70ms rustc 1.86.0
rust 5-m.rs 667ms 6.9ms 5.6MB 2517ms 67ms rustc 1.86.0
rust 1-m.rs 937ms 11ms 8.5MB 3437ms 210ms rustc 1.86.0
rust 3.rs 1112ms 2.4ms 9.3MB 1070ms 30ms rustc 1.86.0
rust 4.rs 1884ms 5.6ms 7.4MB 1867ms 0ms rustc 1.86.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-m.rs 53ms 2.0ms 3.4MB 157ms 13ms rustc 1.86.0
rust 3-m.rs 57ms 2.2ms 4.3MB 180ms 10ms rustc 1.86.0
rust 3.rs 71ms 2.9ms 4.0MB 60ms 0ms rustc 1.86.0
rust 1-m.rs 72ms 0.7ms 3.8MB 227ms 23ms rustc 1.86.0
rust 4.rs 115ms 0.3ms 3.3MB 107ms 0ms rustc 1.86.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 119ms 2.2ms 3.6MB 110ms 0ms rustc 1.86.0
rust 2.rs 424ms 1.6ms 3.6MB 413ms 0ms rustc 1.86.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 33ms 0.4ms 2.9MB 23ms 0ms rustc 1.86.0
rust 2.rs 76ms 0.5ms 3.0MB 70ms 0ms rustc 1.86.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 410ms 0.5ms 2.0MB 1573ms 0ms rustc 1.86.0
rust 5-m.rs 579ms 12ms 2.1MB 2190ms 0ms rustc 1.86.0
rust 2-im.rs 627ms 5.0ms 2.1MB 2440ms 0ms rustc 1.86.0
rust 1-m.rs 970ms 5.3ms 2.1MB 3770ms 0ms rustc 1.86.0
rust 3-i.rs 1508ms 2.6ms 1.9MB 1497ms 0ms rustc 1.86.0
rust 2-i.rs 1759ms 2.8ms 1.8MB 1750ms 0ms rustc 1.86.0
rust 1.rs 2692ms 4.5ms 1.8MB 2683ms 0ms rustc 1.86.0
ocaml 2.ml 2917ms 2.7ms 4.9MB 2907ms 0ms ocaml 5.3.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 38ms 0.5ms 2.1MB 120ms 0ms rustc 1.86.0
rust 5-m.rs 53ms 1.1ms 2.0MB 173ms 0ms rustc 1.86.0
rust 2-im.rs 60ms 1.3ms 2.0MB 200ms 0ms rustc 1.86.0
rust 1-m.rs 87ms 0.9ms 2.0MB 300ms 0ms rustc 1.86.0
rust 3-i.rs 127ms 0.8ms 1.9MB 120ms 0ms rustc 1.86.0
rust 2-i.rs 150ms 0.8ms 1.8MB 140ms 0ms rustc 1.86.0
rust 1.rs 229ms 0.2ms 1.9MB 220ms 0ms rustc 1.86.0
ocaml 2.ml 249ms 3.0ms 4.9MB 240ms 0ms ocaml 5.3.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5c-m.rs 89ms 0.4ms 3.2MB 247ms 0ms rustc 1.86.0
rust 5-m.rs 93ms 1.6ms 3.2MB 277ms 0ms rustc 1.86.0
rust 6.rs 144ms 0.8ms 1.9MB 133ms 0ms rustc 1.86.0
rust 1c.rs 162ms 0.4ms 1.9MB 150ms 0ms rustc 1.86.0
rust 1.rs 194ms 0.5ms 2.0MB 183ms 0ms rustc 1.86.0
ocaml 6.ml 345ms 0.4ms 24.9MB 333ms 0ms ocaml 5.3.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5c-m.rs 16ms 0.6ms 3.2MB 20ms 0ms rustc 1.86.0
rust 5-m.rs 16ms 0.3ms 3.2MB 20ms 0ms rustc 1.86.0
rust 6.rs 17ms 0.8ms 1.9MB 10ms 0ms rustc 1.86.0
rust 1c.rs 19ms 0.2ms 1.8MB 10ms 0ms rustc 1.86.0
rust 1.rs 22ms 0.3ms 1.9MB 13ms 0ms rustc 1.86.0
ocaml 6.ml 39ms 0.6ms 7.5MB 30ms 0ms ocaml 5.3.0

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1-m.rs 306ms 70ms 84.5MB 163ms 513ms rustc 1.86.0
rust 2-m.rs 412ms 81ms 69.0MB 237ms 887ms rustc 1.86.0
rust 2-http2.rs 422ms 21ms 60.3MB 873ms 543ms rustc 1.86.0
rust 1-http2.rs 623ms 77ms 63.6MB 1497ms 697ms rustc 1.86.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1-m.rs 43ms 6.4ms 17.5MB 17ms 60ms rustc 1.86.0
rust 2-m.rs 78ms 6.8ms 21.8MB 30ms 157ms rustc 1.86.0
rust 2-http2.rs 220ms 47ms 27.6MB 560ms 183ms rustc 1.86.0
rust 1-http2.rs 253ms 35ms 27.8MB 683ms 197ms rustc 1.86.0

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-i.rs 28ms 1.1ms 9.8MB 20ms 0ms rustc 1.86.0
rust 4-i.rs 31ms 1.0ms 7.9MB 20ms 0ms rustc 1.86.0
rust 3.rs 62ms 0.9ms 32.0MB 40ms 10ms rustc 1.86.0
rust 2.rs 63ms 1.1ms 33.8MB 40ms 10ms rustc 1.86.0
rust 1.rs 100ms 1.6ms 67.4MB 63ms 23ms rustc 1.86.0

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-i.rs 209ms 2.5ms 52.6MB 183ms 13ms rustc 1.86.0
rust 4-i.rs 259ms 0.4ms 54.3MB 203ms 40ms rustc 1.86.0
rust 2.rs 409ms 4.6ms 237.6MB 307ms 90ms rustc 1.86.0
rust 3.rs 412ms 1.3ms 237.6MB 307ms 90ms rustc 1.86.0
rust 1.rs 686ms 5.4ms 550.2MB 447ms 227ms rustc 1.86.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 227ms 1.7ms 26.6MB 660ms 7ms rustc 1.86.0
rust 8.rs 468ms 3.0ms 22.3MB 450ms 0ms rustc 1.86.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 30ms 3.1ms 16.4MB 67ms 0ms rustc 1.86.0
rust 8.rs 58ms 1.1ms 11.6MB 47ms 0ms rustc 1.86.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 34ms 5.9ms 1.8MB 23ms 0ms rustc 1.86.0
rust 1.rs 57ms 5.3ms 1.9MB 47ms 0ms rustc 1.86.0
ocaml 1.ml 188ms 1.5ms 6.4MB 180ms 0ms ocaml 5.3.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 135ms 6.2ms 1.8MB 123ms 0ms rustc 1.86.0
rust 1.rs 199ms 28ms 1.9MB 190ms 0ms rustc 1.86.0
ocaml 1.ml 542ms 24ms 6.6MB 530ms 0ms ocaml 5.3.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 23ms 0.4ms 1.8MB 17ms 0ms rustc 1.86.0
rust 1.rs 30ms 2.2ms 1.8MB 23ms 0ms rustc 1.86.0
ocaml 1.ml 78ms 1.1ms 5.9MB 70ms 0ms ocaml 5.3.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 703ms 1.4ms 33.8MB 680ms 10ms rustc 1.86.0
ocaml 1.ml 1141ms 35ms 70.2MB 1100ms 30ms ocaml 5.3.0
ocaml 2.ml 2156ms 13ms 91.8MB 2103ms 37ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 150ms 2.2ms 9.8MB 140ms 0ms rustc 1.86.0
ocaml 1.ml 161ms 4.4ms 21.6MB 143ms 7ms ocaml 5.3.0
ocaml 2.ml 362ms 1.5ms 27.7MB 343ms 3ms ocaml 5.3.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 308ms 4.4ms 40.9MB 293ms 0ms rustc 1.86.0
rust 2.rs 328ms 1.8ms 6.6MB 317ms 0ms rustc 1.86.0
ocaml 1.ml 1018ms 5.8ms 550.4MB 963ms 40ms ocaml 5.3.0
ocaml 2.ml 1884ms 9.4ms 17.2MB 1867ms 0ms ocaml 5.3.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 59ms 2.9ms 11.6MB 47ms 0ms rustc 1.86.0
rust 2.rs 83ms 1.0ms 2.9MB 70ms 0ms rustc 1.86.0
ocaml 1.ml 203ms 4.9ms 140.7MB 183ms 10ms ocaml 5.3.0
ocaml 2.ml 463ms 1.3ms 9.1MB 450ms 0ms ocaml 5.3.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1514ms 7.3ms 2.7MB 1303ms 197ms rustc 1.86.0
rust 2.rs 1711ms 4.7ms 2.7MB 1623ms 70ms rustc 1.86.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 320ms 0.7ms 2.4MB 293ms 13ms rustc 1.86.0
rust 2.rs 387ms 2.7ms 2.4MB 377ms 0ms rustc 1.86.0

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7.rs 439ms 6.7ms 77.6MB 457ms 13ms rustc 1.86.0
ocaml 2.ml timeout 0.0ms 462.9MB 4810ms 173ms ocaml 5.3.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7.rs 48ms 0.7ms 12.6MB 40ms 0ms rustc 1.86.0
ocaml 2.ml 551ms 8.1ms 57.1MB 517ms 23ms ocaml 5.3.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 116ms 0.4ms 1.6MB 110ms 0ms rustc 1.86.0
rust 1.rs 1477ms 11ms 1.9MB 1470ms 0ms rustc 1.86.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 31ms 0.1ms 1.8MB 20ms 0ms rustc 1.86.0
rust 1.rs 366ms 0.8ms 1.9MB 360ms 0ms rustc 1.86.0