Programming Language and compiler
Benchmarks

Nim VS Rust benchmarks

Current benchmark data was generated on Mon Jun 23 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
nim 2.nim 825ms 37ms 34.9MB 807ms 7ms nim 2.2.4
nim 2.nim 999ms 22ms 34.7MB 980ms 7ms nim/clang 2.2.4
rust 4.rs 1281ms 3.7ms 33.6MB 1260ms 10ms rustc 1.87.0
rust 5.rs 1360ms 12ms 33.8MB 1337ms 7ms rustc 1.87.0
rust 3.rs 1485ms 57ms 49.8MB 1453ms 17ms rustc 1.87.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 77ms 1.9ms 5.5MB 67ms 0ms nim 2.2.4
nim 2.nim 93ms 2.8ms 5.8MB 83ms 0ms nim/clang 2.2.4
rust 4.rs 124ms 2.4ms 5.8MB 113ms 0ms rustc 1.87.0
rust 5.rs 127ms 3.7ms 5.8MB 117ms 0ms rustc 1.87.0
rust 3.rs 138ms 7.0ms 7.8MB 127ms 0ms rustc 1.87.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-m.rs 529ms 9.1ms 9.1MB 2003ms 57ms rustc 1.87.0
rust 5-m.rs 548ms 114ms 5.5MB 2063ms 63ms rustc 1.87.0
rust 1-m.rs 918ms 4.0ms 7.4MB 3403ms 190ms rustc 1.87.0
rust 3.rs 1104ms 13ms 9.3MB 1063ms 27ms rustc 1.87.0
rust 4.rs 1879ms 5.7ms 6.9MB 1863ms 0ms rustc 1.87.0
nim 1.nim timeout 0.0ms 568.3MB 2650ms 1870ms nim 2.2.4
nim 1.nim timeout 0.0ms 572.7MB 2573ms 1947ms nim/clang 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-m.rs 52ms 1.9ms 3.3MB 163ms 7ms rustc 1.87.0
rust 3-m.rs 59ms 3.2ms 4.4MB 187ms 10ms rustc 1.87.0
rust 3.rs 67ms 0.4ms 4.0MB 57ms 0ms rustc 1.87.0
rust 1-m.rs 71ms 0.4ms 3.5MB 223ms 20ms rustc 1.87.0
rust 4.rs 118ms 4.8ms 3.1MB 107ms 0ms rustc 1.87.0
nim 1.nim 4147ms 10.0ms 519.8MB 2113ms 1603ms nim/clang 2.2.4
nim 1.nim 4190ms 13ms 518.2MB 2160ms 1600ms nim 2.2.4

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5c-m.rs 89ms 0.4ms 3.4MB 260ms 0ms rustc 1.87.0
rust 6.rs 89ms 0.5ms 1.9MB 80ms 0ms rustc 1.87.0
rust 5-m.rs 94ms 0.8ms 3.2MB 293ms 0ms rustc 1.87.0
rust 1c.rs 162ms 0.5ms 1.9MB 150ms 0ms rustc 1.87.0
nim 2.nim 188ms 2.2ms 1.5MB 180ms 0ms nim 2.2.4
rust 1.rs 196ms 1.0ms 1.9MB 190ms 0ms rustc 1.87.0
nim 2.nim 240ms 0.1ms 1.8MB 230ms 0ms nim/clang 2.2.4
nim 1.nim 542ms 2.9ms 1.9MB 450ms 80ms nim/clang 2.2.4
nim 1.nim 561ms 3.3ms 1.5MB 470ms 77ms nim 2.2.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 6.rs 12ms 1.2ms 1.9MB 10ms 0ms rustc 1.87.0
rust 5c-m.rs 16ms 0.5ms 3.2MB 27ms 0ms rustc 1.87.0
rust 5-m.rs 17ms 0.5ms 3.2MB 30ms 0ms rustc 1.87.0
rust 1c.rs 19ms 0.3ms 1.9MB 10ms 0ms rustc 1.87.0
nim 2.nim 21ms 0.1ms 1.5MB 10ms 0ms nim 2.2.4
rust 1.rs 22ms 0.4ms 2.0MB 10ms 0ms rustc 1.87.0
nim 2.nim 27ms 1.0ms 1.8MB 20ms 0ms nim/clang 2.2.4
nim 1.nim 57ms 0.5ms 1.8MB 37ms 3ms nim/clang 2.2.4
nim 1.nim 59ms 0.6ms 1.5MB 40ms 7ms nim 2.2.4

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1.0ms 0.0ms 1.6MB 0ms 0ms nim 2.2.4
nim 1.nim 1.1ms 0.0ms 1.9MB 0ms 0ms nim/clang 2.2.4
rust 1.rs 1.2ms 0.1ms 1.8MB 0ms 0ms rustc 1.87.0
rust 1.rs 1.2ms 0.0ms 1.8MB 0ms 0ms rustc 1.89.0-nightly

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 35ms 5.1ms 1.9MB 27ms 0ms rustc 1.87.0
rust 1.rs 49ms 4.1ms 1.9MB 43ms 0ms rustc 1.87.0
nim 2.nim 113ms 2.8ms 1.8MB 107ms 0ms nim/clang 2.2.4
nim 2.nim 116ms 1.5ms 1.4MB 110ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.4

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 143ms 28ms 1.8MB 133ms 0ms rustc 1.87.0
rust 1.rs 175ms 13ms 1.9MB 167ms 0ms rustc 1.87.0
nim 2.nim 328ms 6.2ms 1.6MB 317ms 0ms nim/clang 2.2.4
nim 2.nim 336ms 4.0ms 1.4MB 330ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.4

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 24ms 2.0ms 1.8MB 17ms 0ms rustc 1.87.0
rust 1.rs 29ms 0.5ms 1.8MB 20ms 0ms rustc 1.87.0
nim 2.nim 48ms 0.0ms 1.8MB 40ms 0ms nim/clang 2.2.4
nim 2.nim 50ms 0.4ms 1.3MB 40ms 0ms nim 2.2.4
nim 1.nim 478ms 6.6ms 1.5MB 470ms 0ms nim/clang 2.2.4
nim 1.nim 483ms 14ms 1.3MB 477ms 0ms nim 2.2.4

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 256ms 17ms 4.8MB 250ms 0ms rustc 1.89.0-nightly
rust 8.rs 293ms 1.7ms 4.9MB 283ms 0ms rustc 1.87.0
nim 1.nim 389ms 0.9ms 4.8MB 380ms 0ms nim/clang 2.2.4
nim 1.nim 577ms 4.1ms 4.5MB 563ms 0ms nim 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 12ms 0.5ms 2.0MB 0ms 0ms rustc 1.89.0-nightly
rust 8.rs 14ms 0.1ms 2.0MB 10ms 0ms rustc 1.87.0
nim 1.nim 19ms 0.7ms 1.9MB 10ms 0ms nim/clang 2.2.4
nim 1.nim 26ms 0.4ms 1.6MB 20ms 0ms nim 2.2.4

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 568ms 19ms 34.9MB 550ms 3ms nim 2.2.4
nim 1.nim 633ms 12ms 34.2MB 617ms 3ms nim/clang 2.2.4
rust 1.rs 708ms 3.5ms 33.8MB 683ms 10ms rustc 1.87.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 119ms 2.4ms 9.6MB 107ms 0ms nim 2.2.4
nim 1.nim 138ms 2.2ms 9.9MB 127ms 0ms nim/clang 2.2.4
rust 1.rs 151ms 2.0ms 9.8MB 140ms 0ms rustc 1.87.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 164ms 0.9ms 1.9MB 160ms 0ms rustc 1.87.0
rust 7-i.rs 219ms 0.9ms 1.8MB 210ms 0ms rustc 1.87.0
rust 1.rs 230ms 0.5ms 1.9MB 220ms 0ms rustc 1.87.0
rust 3.rs 279ms 0.3ms 1.9MB 270ms 0ms rustc 1.89.0-nightly
rust 2.rs 279ms 0.6ms 1.8MB 270ms 0ms rustc 1.87.0
nim 2.nim 321ms 2.4ms 1.8MB 310ms 0ms nim 2.2.4
nim 2.nim 344ms 1.2ms 1.9MB 330ms 0ms nim/clang 2.2.4

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 19ms 0.1ms 1.8MB 10ms 0ms rustc 1.87.0
rust 7-i.rs 24ms 0.2ms 1.8MB 20ms 0ms rustc 1.87.0
rust 1.rs 25ms 0.2ms 1.8MB 20ms 0ms rustc 1.87.0
rust 3.rs 30ms 0.1ms 1.8MB 20ms 0ms rustc 1.89.0-nightly
rust 2.rs 30ms 0.4ms 1.8MB 20ms 0ms rustc 1.87.0
nim 2.nim 34ms 0.6ms 1.8MB 30ms 0ms nim 2.2.4
nim 2.nim 38ms 1.4ms 2.0MB 30ms 0ms nim/clang 2.2.4

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 306ms 36ms 41.5MB 297ms 0ms nim 2.2.4
rust 1.rs 317ms 11ms 40.9MB 300ms 0ms rustc 1.87.0
rust 2.rs 318ms 4.7ms 6.6MB 307ms 0ms rustc 1.87.0
nim 1.nim 334ms 13ms 41.8MB 323ms 0ms nim/clang 2.2.4

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 51ms 1.1ms 11.5MB 40ms 0ms nim 2.2.4
rust 1.rs 60ms 1.5ms 11.6MB 50ms 0ms rustc 1.87.0
nim 1.nim 67ms 7.6ms 11.8MB 60ms 0ms nim/clang 2.2.4
rust 2.rs 78ms 0.2ms 2.9MB 70ms 0ms rustc 1.87.0

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7.rs 442ms 4.0ms 78.6MB 450ms 17ms rustc 1.87.0
nim 1.nim 1646ms 3.9ms 152.4MB 1610ms 23ms nim/clang 2.2.4
nim 1.nim 1674ms 7.4ms 151.5MB 1640ms 20ms nim 2.2.4

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7.rs 51ms 1.5ms 11.6MB 43ms 0ms rustc 1.87.0
nim 1.nim 174ms 3.1ms 17.6MB 160ms 0ms nim/clang 2.2.4
nim 1.nim 178ms 1.7ms 17.4MB 160ms 0ms nim 2.2.4

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7-m.rs 492ms 0.0ms 2.1MB 1907ms 7ms rustc 1.87.0
rust 8-m.rs 497ms 4.4ms 2.4MB 1893ms 3ms rustc 1.89.0-nightly
rust 8.rs 991ms 0.5ms 2.3MB 980ms 0ms rustc 1.89.0-nightly
rust 7.rs 1957ms 10ms 1.9MB 1947ms 0ms rustc 1.87.0
rust 2-m.rs 2070ms 0.9ms 2.3MB 8153ms 7ms rustc 1.87.0
nim 1.nim 3589ms 1.4ms 2.0MB 3580ms 0ms nim/clang 2.2.4
nim 1.nim 3601ms 3.5ms 1.4MB 3593ms 0ms nim 2.2.4
rust 2.rs 4266ms 8.9ms 2.1MB 4257ms 0ms rustc 1.87.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7-m.rs 128ms 0.4ms 2.1MB 470ms 0ms rustc 1.87.0
rust 8-m.rs 128ms 0.2ms 2.3MB 470ms 0ms rustc 1.89.0-nightly
rust 8.rs 250ms 0.1ms 2.1MB 240ms 0ms rustc 1.89.0-nightly
rust 7.rs 495ms 6.2ms 1.8MB 487ms 0ms rustc 1.87.0
rust 2-m.rs 521ms 0.3ms 2.1MB 2020ms 3ms rustc 1.87.0
nim 1.nim 899ms 0.7ms 1.5MB 890ms 0ms nim/clang 2.2.4
nim 1.nim 903ms 1.2ms 1.3MB 893ms 0ms nim 2.2.4
rust 2.rs 1067ms 0.1ms 2.0MB 1060ms 0ms rustc 1.87.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 36ms 0.5ms 2.3MB 110ms 0ms rustc 1.89.0-nightly
rust 7-m.rs 36ms 0.5ms 2.0MB 113ms 0ms rustc 1.87.0
rust 8.rs 65ms 0.5ms 2.0MB 60ms 0ms rustc 1.89.0-nightly
rust 7.rs 125ms 1.2ms 1.9MB 120ms 0ms rustc 1.87.0
rust 2-m.rs 134ms 0.3ms 2.0MB 490ms 0ms rustc 1.87.0
nim 1.nim 227ms 0.4ms 1.5MB 220ms 0ms nim/clang 2.2.4
nim 1.nim 228ms 1.8ms 1.3MB 220ms 0ms nim 2.2.4
rust 2.rs 269ms 0.2ms 1.9MB 260ms 0ms rustc 1.87.0