Programming Language and compiler
Benchmarks

Rust VS C benchmarks

Current benchmark data was generated on Mon May 19 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
c 1.c 0.9ms 0.0ms 1.4MB 0ms 0ms zigcc 0.14.0
c 1.c 1.2ms 0.1ms 2.1MB 0ms 0ms gcc 15.1.0
rust 1.rs 1.2ms 0.0ms 1.8MB 0ms 0ms rustc 1.87.0
c 1.c 1.3ms 0.0ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
rust 1.rs 1.7ms 0.6ms 1.8MB 0ms 0ms rustc 1.89.0-nightly

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 211ms 5.6ms 7.5MB 787ms 13ms clang 14.0.0-1ubuntu1.1
rust 9.rs 265ms 15ms 4.9MB 253ms 0ms rustc 1.89.0-nightly
c 1-mffi.c 270ms 9.6ms 6.6MB 820ms 0ms gcc 15.1.0
rust 8.rs 291ms 0.6ms 4.8MB 280ms 0ms rustc 1.87.0
c 1-mffi.c 329ms 0.2ms 6.0MB 320ms 0ms zigcc 0.14.0
c 1-ffi.c 331ms 2.0ms 6.0MB 320ms 0ms zigcc 0.14.0
c 1-ffi.c 460ms 4.3ms 6.7MB 447ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 542ms 0.1ms 6.8MB 530ms 0ms gcc 15.1.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 13ms 0.5ms 2.0MB 10ms 0ms rustc 1.89.0-nightly
rust 8.rs 14ms 0.2ms 1.9MB 10ms 0ms rustc 1.87.0
c 1-mffi.c 15ms 0.3ms 4.6MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 16ms 0.4ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 16ms 0.2ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 18ms 2.4ms 3.8MB 47ms 0ms gcc 15.1.0
c 1-ffi.c 22ms 0.4ms 3.8MB 13ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 26ms 1.0ms 3.6MB 20ms 0ms gcc 15.1.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 164ms 0.6ms 1.8MB 160ms 0ms rustc 1.87.0
rust 7-i.rs 218ms 0.5ms 1.8MB 210ms 0ms rustc 1.87.0
rust 1.rs 229ms 1.1ms 1.8MB 220ms 0ms rustc 1.87.0
c 8-i.c 266ms 0.1ms 1.5MB 260ms 0ms zigcc 0.14.0
rust 2.rs 279ms 0.0ms 1.8MB 270ms 0ms rustc 1.87.0
rust 3.rs 279ms 0.5ms 1.8MB 270ms 0ms rustc 1.89.0-nightly
c 8-i.c 301ms 2.3ms 2.1MB 290ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 308ms 0.2ms 2.3MB 300ms 0ms gcc 15.1.0
c 5.c 313ms 0.9ms 2.3MB 300ms 0ms gcc 15.1.0
c 2.c 315ms 2.1ms 1.5MB 307ms 0ms zigcc 0.14.0
c 5.c 316ms 0.9ms 1.5MB 310ms 0ms zigcc 0.14.0
c 5.c 317ms 1.4ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 320ms 3.6ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 337ms 0.3ms 2.3MB 330ms 0ms gcc 15.1.0

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 1.87.0
rust 7-i.rs 24ms 0.4ms 1.8MB 20ms 0ms rustc 1.87.0
rust 1.rs 25ms 0.4ms 1.8MB 20ms 0ms rustc 1.87.0
c 8-i.c 29ms 0.6ms 1.5MB 20ms 0ms zigcc 0.14.0
rust 2.rs 30ms 0.0ms 1.6MB 20ms 0ms rustc 1.87.0
rust 3.rs 30ms 0.1ms 1.8MB 20ms 0ms rustc 1.89.0-nightly
c 8-i.c 33ms 0.7ms 2.1MB 23ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 33ms 0.4ms 2.3MB 30ms 0ms gcc 15.1.0
c 5.c 33ms 0.1ms 2.3MB 27ms 0ms gcc 15.1.0
c 5.c 34ms 0.4ms 2.1MB 27ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 34ms 1.0ms 1.5MB 30ms 0ms zigcc 0.14.0
c 5.c 34ms 0.7ms 1.5MB 30ms 0ms zigcc 0.14.0
c 8-i.c 36ms 0.4ms 2.3MB 30ms 0ms gcc 15.1.0
c 2.c 38ms 2.0ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 493ms 0.6ms 2.5MB 1910ms 0ms rustc 1.89.0-nightly
rust 7-m.rs 493ms 0.7ms 2.1MB 1910ms 0ms rustc 1.87.0
c 3-m.c 736ms 1.0ms 2.3MB 2893ms 0ms gcc 15.1.0
c 6-im.c 952ms 1.7ms 2.0MB 3753ms 0ms gcc 15.1.0
c 4-m.c 989ms 1.3ms 2.1MB 3890ms 0ms gcc 15.1.0
rust 8.rs 993ms 1.0ms 2.3MB 983ms 0ms rustc 1.89.0-nightly
c 6-im.c 1001ms 0.7ms 3.1MB 3933ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 1118ms 0.5ms 3.3MB 4400ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1174ms 26ms 2.3MB 4553ms 0ms gcc 15.1.0
c 5-im.c 1341ms 14ms 3.3MB 5260ms 3ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1846ms 16ms 3.3MB 7243ms 10ms clang 14.0.0-1ubuntu1.1
rust 7.rs 1961ms 4.4ms 1.9MB 1950ms 0ms rustc 1.87.0
rust 2-m.rs 2070ms 3.8ms 2.3MB 8130ms 10ms rustc 1.87.0
rust 2.rs 4266ms 1.8ms 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 8-m.rs 127ms 0.5ms 2.3MB 467ms 3ms rustc 1.89.0-nightly
rust 7-m.rs 128ms 0.3ms 2.1MB 467ms 3ms rustc 1.87.0
c 3-m.c 195ms 2.3ms 2.0MB 737ms 0ms gcc 15.1.0
c 6-im.c 246ms 1.4ms 2.0MB 947ms 0ms gcc 15.1.0
rust 8.rs 251ms 0.6ms 2.0MB 240ms 0ms rustc 1.89.0-nightly
c 6-im.c 258ms 0.3ms 3.4MB 987ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 259ms 0.8ms 2.1MB 993ms 0ms gcc 15.1.0
c 4-m.c 289ms 1.6ms 3.3MB 1107ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 298ms 7.8ms 2.0MB 1143ms 0ms gcc 15.1.0
c 5-im.c 340ms 1.4ms 3.3MB 1310ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 466ms 4.2ms 3.4MB 1800ms 0ms clang 14.0.0-1ubuntu1.1
rust 7.rs 493ms 1.4ms 1.8MB 480ms 0ms rustc 1.87.0
rust 2-m.rs 521ms 0.9ms 2.3MB 2030ms 0ms rustc 1.87.0
rust 2.rs 1069ms 4.4ms 2.0MB 1063ms 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 35ms 0.1ms 2.1MB 107ms 3ms rustc 1.89.0-nightly
rust 7-m.rs 36ms 0.6ms 2.0MB 113ms 0ms rustc 1.87.0
c 3-m.c 57ms 1.9ms 2.3MB 193ms 0ms gcc 15.1.0
rust 8.rs 65ms 0.9ms 1.9MB 60ms 0ms rustc 1.89.0-nightly
c 6-im.c 72ms 3.1ms 3.4MB 250ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 73ms 0.8ms 2.0MB 260ms 0ms gcc 15.1.0
c 6-im.c 73ms 7.6ms 2.0MB 260ms 0ms gcc 15.1.0
c 4-m.c 78ms 1.0ms 3.1MB 277ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 81ms 0.3ms 2.0MB 290ms 0ms gcc 15.1.0
c 5-im.c 92ms 0.5ms 3.1MB 330ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 124ms 1.7ms 3.3MB 457ms 0ms clang 14.0.0-1ubuntu1.1
rust 7.rs 128ms 2.5ms 1.8MB 120ms 0ms rustc 1.87.0
rust 2-m.rs 134ms 0.7ms 2.1MB 490ms 3ms rustc 1.87.0
rust 2.rs 269ms 1.2ms 1.9MB 260ms 0ms rustc 1.87.0

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4.rs 1281ms 13ms 33.8MB 1260ms 7ms rustc 1.87.0
rust 5.rs 1340ms 6.3ms 33.8MB 1317ms 10ms rustc 1.87.0
rust 3.rs 1496ms 49ms 49.8MB 1463ms 17ms rustc 1.87.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4.rs 118ms 0.3ms 5.6MB 110ms 0ms rustc 1.87.0
rust 5.rs 128ms 5.4ms 5.8MB 117ms 0ms rustc 1.87.0
rust 3.rs 142ms 6.5ms 7.8MB 130ms 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 518ms 38ms 9.1MB 1957ms 60ms rustc 1.87.0
rust 5-m.rs 679ms 12ms 5.5MB 2580ms 67ms rustc 1.87.0
rust 1-m.rs 955ms 8.3ms 7.4MB 3497ms 227ms rustc 1.87.0
rust 3.rs 1110ms 9.5ms 9.3MB 1070ms 23ms rustc 1.87.0
rust 4.rs 1921ms 31ms 6.9MB 1903ms 0ms rustc 1.87.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-m.rs 51ms 1.1ms 3.3MB 153ms 10ms rustc 1.87.0
rust 3-m.rs 55ms 3.2ms 4.1MB 173ms 10ms rustc 1.87.0
rust 3.rs 69ms 0.8ms 4.0MB 60ms 0ms rustc 1.87.0
rust 1-m.rs 73ms 0.3ms 3.5MB 237ms 17ms rustc 1.87.0
rust 4.rs 115ms 1.2ms 3.1MB 107ms 0ms rustc 1.87.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 124ms 1.5ms 3.6MB 120ms 0ms rustc 1.87.0
rust 2.rs 421ms 2.7ms 3.6MB 410ms 0ms rustc 1.87.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 33ms 0.7ms 2.9MB 23ms 0ms rustc 1.87.0
rust 2.rs 77ms 2.2ms 3.0MB 70ms 0ms rustc 1.87.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 410ms 1.7ms 2.1MB 1587ms 0ms rustc 1.87.0
rust 5-m.rs 554ms 1.8ms 2.1MB 2130ms 0ms rustc 1.87.0
rust 2-im.rs 677ms 6.8ms 2.1MB 2577ms 0ms rustc 1.87.0
rust 1-m.rs 937ms 1.3ms 2.1MB 3610ms 0ms rustc 1.87.0
rust 3-i.rs 1497ms 1.4ms 1.9MB 1490ms 0ms rustc 1.87.0
rust 2-i.rs 2404ms 0.4ms 1.8MB 2397ms 0ms rustc 1.87.0
rust 1.rs 2718ms 7.7ms 1.8MB 2710ms 0ms rustc 1.87.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 38ms 0.2ms 2.0MB 120ms 0ms rustc 1.87.0
rust 5-m.rs 52ms 0.4ms 2.0MB 170ms 0ms rustc 1.87.0
rust 2-im.rs 61ms 2.2ms 2.0MB 200ms 0ms rustc 1.87.0
rust 1-m.rs 83ms 0.6ms 2.0MB 290ms 0ms rustc 1.87.0
rust 3-i.rs 125ms 0.5ms 1.9MB 120ms 0ms rustc 1.87.0
rust 2-i.rs 197ms 0.2ms 1.8MB 190ms 0ms rustc 1.87.0
rust 1.rs 223ms 0.9ms 1.8MB 213ms 0ms rustc 1.87.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 6.rs 88ms 2.2ms 1.9MB 80ms 0ms rustc 1.87.0
rust 5c-m.rs 88ms 0.3ms 3.4MB 240ms 0ms rustc 1.87.0
rust 5-m.rs 94ms 0.1ms 3.2MB 290ms 3ms rustc 1.87.0
rust 1c.rs 163ms 0.5ms 1.9MB 150ms 0ms rustc 1.87.0
rust 1.rs 194ms 0.9ms 2.0MB 183ms 0ms rustc 1.87.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 6.rs 11ms 0.1ms 1.9MB 0ms 0ms rustc 1.87.0
rust 5c-m.rs 15ms 0.3ms 3.2MB 20ms 0ms rustc 1.87.0
rust 5-m.rs 16ms 0.6ms 3.2MB 30ms 0ms rustc 1.87.0
rust 1c.rs 19ms 0.4ms 1.9MB 10ms 0ms rustc 1.87.0
rust 1.rs 21ms 0.3ms 1.9MB 10ms 0ms rustc 1.87.0

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1-m.rs 270ms 61ms 77.4MB 157ms 457ms rustc 1.87.0
rust 2-http2.rs 326ms 164ms 68.9MB 737ms 370ms rustc 1.87.0
rust 2-m.rs 345ms 31ms 71.5MB 227ms 810ms rustc 1.87.0
rust 1-http2.rs 448ms 106ms 63.1MB 1033ms 527ms rustc 1.87.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1-m.rs 36ms 6.9ms 13.5MB 10ms 53ms rustc 1.87.0
rust 2-m.rs 71ms 2.4ms 20.4MB 33ms 147ms rustc 1.87.0
rust 1-http2.rs 230ms 40ms 26.1MB 613ms 183ms rustc 1.87.0
rust 2-http2.rs 239ms 44ms 28.0MB 623ms 190ms rustc 1.87.0

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-i.rs 28ms 0.6ms 9.8MB 20ms 0ms rustc 1.87.0
rust 4-i.rs 30ms 0.8ms 7.9MB 20ms 0ms rustc 1.87.0
rust 2.rs 61ms 2.0ms 33.8MB 40ms 10ms rustc 1.87.0
rust 3.rs 61ms 0.0ms 32.0MB 40ms 10ms rustc 1.87.0
rust 1.rs 103ms 1.7ms 67.4MB 63ms 27ms rustc 1.87.0

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-i.rs 211ms 3.8ms 52.8MB 187ms 10ms rustc 1.87.0
rust 4-i.rs 261ms 3.9ms 54.5MB 207ms 43ms rustc 1.87.0
rust 2.rs 395ms 2.3ms 237.8MB 290ms 90ms rustc 1.87.0
rust 3.rs 404ms 3.8ms 237.8MB 300ms 93ms rustc 1.87.0
rust 1.rs 686ms 3.1ms 551.8MB 433ms 233ms rustc 1.87.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 171ms 2.2ms 23.3MB 400ms 10ms gcc 15.1.0
rust 8-m.rs 211ms 4.2ms 27.7MB 623ms 10ms rustc 1.87.0
c 1-m.c 304ms 9.4ms 25.6MB 1047ms 27ms clang 14.0.0-1ubuntu1.1
rust 8.rs 427ms 19ms 24.0MB 407ms 7ms rustc 1.87.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 28ms 0.6ms 12.9MB 60ms 0ms gcc 15.1.0
rust 8-m.rs 29ms 0.6ms 15.4MB 60ms 0ms rustc 1.87.0
c 1-m.c 38ms 1.4ms 14.9MB 110ms 0ms clang 14.0.0-1ubuntu1.1
rust 8.rs 56ms 2.1ms 11.4MB 40ms 0ms rustc 1.87.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 35ms 7.9ms 1.8MB 27ms 0ms rustc 1.87.0
rust 1.rs 51ms 6.1ms 1.9MB 43ms 0ms rustc 1.87.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 139ms 28ms 1.9MB 130ms 0ms rustc 1.87.0
rust 1.rs 191ms 16ms 1.9MB 183ms 0ms rustc 1.87.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 24ms 1.0ms 1.8MB 17ms 0ms rustc 1.87.0
rust 1.rs 31ms 0.2ms 1.8MB 20ms 0ms rustc 1.87.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 698ms 4.2ms 33.8MB 673ms 10ms rustc 1.87.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 153ms 2.6ms 9.8MB 143ms 0ms rustc 1.87.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 282ms 11ms 40.9MB 263ms 0ms gcc 15.1.0
rust 2.rs 301ms 0.2ms 6.6MB 290ms 0ms rustc 1.87.0
c 1.c 303ms 3.8ms 40.8MB 287ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 307ms 13ms 40.3MB 290ms 0ms zigcc 0.14.0
rust 1.rs 331ms 4.3ms 40.9MB 317ms 0ms rustc 1.87.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 52ms 2.8ms 11.8MB 40ms 0ms gcc 15.1.0
c 1.c 53ms 2.1ms 11.7MB 40ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 58ms 3.4ms 11.0MB 47ms 0ms zigcc 0.14.0
rust 1.rs 67ms 0.1ms 11.6MB 57ms 0ms rustc 1.87.0
rust 2.rs 77ms 2.0ms 2.9MB 70ms 0ms rustc 1.87.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1529ms 17ms 2.7MB 1310ms 203ms rustc 1.87.0
rust 2.rs 1712ms 5.2ms 2.7MB 1627ms 70ms rustc 1.87.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 321ms 3.7ms 2.4MB 297ms 10ms rustc 1.87.0
rust 2.rs 385ms 5.9ms 2.4MB 377ms 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 2.7ms 78.6MB 453ms 17ms rustc 1.87.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7.rs 51ms 0.8ms 11.6MB 43ms 3ms rustc 1.87.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 117ms 2.1ms 1.8MB 110ms 0ms rustc 1.87.0
rust 1.rs 1448ms 50ms 1.9MB 1437ms 0ms rustc 1.87.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 31ms 0.7ms 1.8MB 23ms 0ms rustc 1.87.0
rust 1.rs 357ms 4.0ms 1.9MB 347ms 0ms rustc 1.87.0