Programming Language and compiler
Benchmarks

OCaml VS Rust 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.)

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

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

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

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

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

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

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

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