Programming Language and compiler
Benchmarks

Zig VS Rust benchmarks

Current benchmark data was generated on Tue Mar 25 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 1295ms 3.8ms 33.6MB 1273ms 10ms rustc 1.85.1
rust 5.rs 1401ms 21ms 33.8MB 1377ms 7ms rustc 1.85.1
rust 3.rs 1556ms 12ms 49.8MB 1523ms 20ms rustc 1.85.1
zig 1.zig 1906ms 32ms 49.0MB 1873ms 17ms zig 0.14.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4.rs 123ms 2.5ms 5.8MB 113ms 0ms rustc 1.85.1
rust 5.rs 127ms 3.9ms 5.8MB 117ms 0ms rustc 1.85.1
rust 3.rs 136ms 2.8ms 7.8MB 123ms 0ms rustc 1.85.1
zig 1.zig 153ms 1.1ms 7.0MB 140ms 0ms zig 0.14.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 120ms 0.7ms 3.6MB 110ms 0ms rustc 1.85.1
rust 2.rs 424ms 2.4ms 3.8MB 410ms 0ms rustc 1.85.1
zig 1.zig 2275ms 0.2ms 2.5MB 2243ms 17ms zig 0.14.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 33ms 1.6ms 2.9MB 23ms 0ms rustc 1.85.1
rust 2.rs 78ms 1.2ms 3.0MB 70ms 0ms rustc 1.85.1
zig 1.zig 384ms 2.2ms 1.9MB 370ms 3ms zig 0.14.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 412ms 1.0ms 2.0MB 1580ms 0ms rustc 1.85.1
rust 5-m.rs 575ms 7.0ms 2.1MB 2190ms 0ms rustc 1.85.1
rust 2-im.rs 623ms 2.8ms 2.0MB 2400ms 0ms rustc 1.85.1
zig 2-m.zig 637ms 0.7ms 1.4MB 2403ms 0ms zig 0.14.0
rust 1-m.rs 994ms 7.8ms 2.1MB 3783ms 0ms rustc 1.85.1
rust 3-i.rs 1500ms 1.0ms 1.9MB 1490ms 0ms rustc 1.85.1
rust 2-i.rs 1765ms 5.9ms 1.8MB 1757ms 0ms rustc 1.85.1
zig 3-i.zig 1766ms 4.1ms 1.0MB 1753ms 0ms zig 0.14.0
rust 1.rs 2681ms 4.0ms 1.8MB 2673ms 0ms rustc 1.85.1
zig 1.zig 2713ms 3.8ms 1.0MB 2707ms 0ms zig 0.14.0

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 1.85.1
rust 5-m.rs 54ms 1.6ms 2.0MB 177ms 0ms rustc 1.85.1
zig 2-m.zig 60ms 0.8ms 1.4MB 200ms 0ms zig 0.14.0
rust 2-im.rs 61ms 0.7ms 2.0MB 200ms 0ms rustc 1.85.1
rust 1-m.rs 90ms 1.9ms 2.1MB 313ms 0ms rustc 1.85.1
rust 3-i.rs 126ms 0.9ms 1.9MB 120ms 0ms rustc 1.85.1
zig 3-i.zig 148ms 0.2ms 1.0MB 140ms 0ms zig 0.14.0
rust 2-i.rs 149ms 0.7ms 1.8MB 140ms 0ms rustc 1.85.1
rust 1.rs 227ms 1.5ms 1.8MB 217ms 0ms rustc 1.85.1
zig 1.zig 230ms 0.3ms 1.0MB 220ms 0ms zig 0.14.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 88ms 1.2ms 1.0MB 80ms 0ms zig 0.14.0
rust 5c-m.rs 91ms 0.5ms 3.2MB 260ms 3ms rustc 1.85.1
rust 5-m.rs 95ms 0.4ms 3.2MB 297ms 0ms rustc 1.85.1
rust 1c.rs 162ms 1.0ms 1.9MB 153ms 0ms rustc 1.85.1
rust 1.rs 196ms 1.0ms 1.9MB 187ms 0ms rustc 1.85.1

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 11ms 0.8ms 1.0MB 0ms 0ms zig 0.14.0
rust 5c-m.rs 16ms 0.5ms 3.2MB 27ms 0ms rustc 1.85.1
rust 5-m.rs 16ms 0.9ms 3.2MB 27ms 0ms rustc 1.85.1
rust 1c.rs 19ms 0.3ms 1.9MB 10ms 0ms rustc 1.85.1
rust 1.rs 22ms 0.7ms 2.0MB 10ms 0ms rustc 1.85.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 1.0ms 0.0ms 1.1MB 0ms 0ms zig 0.14.0
rust 1.rs 1.2ms 0.1ms 1.8MB 0ms 0ms rustc 1.85.1
rust 1.rs 1.4ms 0.2ms 1.9MB 0ms 0ms rustc 1.87.0-nightly

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 219ms 7.0ms 27.3MB 653ms 10ms rustc 1.85.1
rust 8.rs 485ms 15ms 22.3MB 467ms 7ms rustc 1.85.1
zig 1.zig 500ms 4.6ms 26.3MB 480ms 7ms zig 0.14.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 30ms 2.2ms 16.0MB 63ms 0ms rustc 1.85.1
rust 8.rs 59ms 1.1ms 11.6MB 50ms 0ms rustc 1.85.1
zig 1.zig 66ms 0.7ms 15.3MB 50ms 0ms zig 0.14.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 33ms 0.3ms 2.8MB 23ms 0ms zig 0.14.0
rust 0-unsafe.rs 42ms 4.5ms 1.8MB 37ms 0ms rustc 1.85.1
rust 1.rs 52ms 8.0ms 2.0MB 47ms 0ms rustc 1.85.1

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 95ms 2.4ms 2.8MB 87ms 0ms zig 0.14.0
rust 0-unsafe.rs 143ms 14ms 1.9MB 137ms 0ms rustc 1.85.1
rust 1.rs 193ms 34ms 2.0MB 183ms 0ms rustc 1.85.1

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 16ms 1.3ms 1.3MB 10ms 0ms zig 0.14.0
rust 0-unsafe.rs 26ms 0.9ms 1.8MB 20ms 0ms rustc 1.85.1
rust 1.rs 29ms 0.1ms 1.8MB 20ms 0ms rustc 1.85.1

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 247ms 0.1ms 4.0MB 240ms 0ms zig 0.14.0
rust 9.rs 256ms 16ms 4.7MB 250ms 0ms rustc 1.87.0-nightly
rust 8.rs 308ms 1.4ms 4.7MB 300ms 0ms rustc 1.85.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 12ms 0.2ms 1.1MB 10ms 0ms zig 0.14.0
rust 9.rs 13ms 0.2ms 1.9MB 10ms 0ms rustc 1.87.0-nightly
rust 8.rs 18ms 5.2ms 1.9MB 13ms 0ms rustc 1.85.1

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 708ms 3.7ms 33.8MB 683ms 10ms rustc 1.85.1
zig 1.zig 878ms 6.2ms 41.0MB 853ms 10ms zig 0.14.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 153ms 0.3ms 9.8MB 140ms 0ms rustc 1.85.1
zig 1.zig 181ms 5.2ms 11.0MB 167ms 0ms zig 0.14.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 168ms 2.2ms 1.9MB 160ms 0ms rustc 1.85.1
rust 7-i.rs 238ms 0.9ms 1.9MB 230ms 0ms rustc 1.85.1
rust 1.rs 240ms 0.8ms 1.8MB 230ms 0ms rustc 1.85.1
rust 3.rs 280ms 0.4ms 1.8MB 270ms 0ms rustc 1.87.0-nightly
zig 2.zig 280ms 0.4ms 1.0MB 270ms 0ms zig 0.14.0
rust 2.rs 288ms 8.0ms 1.6MB 277ms 0ms rustc 1.85.1
zig 1.zig 315ms 1.2ms 1.1MB 303ms 0ms zig 0.14.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 19ms 0.3ms 1.8MB 10ms 0ms rustc 1.85.1
rust 7-i.rs 26ms 0.2ms 1.8MB 20ms 0ms rustc 1.85.1
rust 1.rs 26ms 0.3ms 1.9MB 20ms 0ms rustc 1.85.1
zig 2.zig 30ms 0.1ms 1.0MB 20ms 0ms zig 0.14.0
rust 3.rs 30ms 0.1ms 1.8MB 20ms 0ms rustc 1.87.0-nightly
rust 2.rs 30ms 0.7ms 1.8MB 20ms 0ms rustc 1.85.1
zig 1.zig 34ms 0.4ms 1.1MB 27ms 0ms zig 0.14.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 283ms 4.4ms 40.1MB 270ms 0ms zig 0.14.0
rust 2.rs 317ms 3.9ms 6.7MB 307ms 0ms rustc 1.85.1
rust 1.rs 323ms 1.8ms 40.9MB 303ms 0ms rustc 1.85.1
zig 2.zig 331ms 3.8ms 6.0MB 320ms 0ms zig 0.14.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 56ms 2.5ms 10.8MB 47ms 0ms zig 0.14.0
rust 1.rs 61ms 2.9ms 11.6MB 50ms 0ms rustc 1.85.1
rust 2.rs 79ms 2.3ms 2.9MB 70ms 0ms rustc 1.85.1
zig 2.zig 81ms 0.9ms 2.3MB 70ms 0ms zig 0.14.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1529ms 3.0ms 2.7MB 1307ms 203ms rustc 1.85.1
rust 2.rs 1714ms 6.0ms 2.7MB 1623ms 80ms rustc 1.85.1
zig 1.zig 2466ms 27ms 2.2MB 2440ms 17ms zig 0.14.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 324ms 4.0ms 2.4MB 297ms 10ms rustc 1.85.1
rust 2.rs 382ms 2.4ms 2.4MB 370ms 0ms rustc 1.85.1
zig 1.zig 569ms 3.4ms 1.8MB 557ms 0ms zig 0.14.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 494ms 0.3ms 2.5MB 1913ms 0ms rustc 1.87.0-nightly
rust 7-m.rs 501ms 1.3ms 2.3MB 1937ms 7ms rustc 1.85.1
rust 8.rs 994ms 1.8ms 2.4MB 980ms 0ms rustc 1.87.0-nightly
rust 2-m.rs 1967ms 0.5ms 2.3MB 7720ms 7ms rustc 1.85.1
rust 7.rs 2112ms 8.4ms 2.0MB 2103ms 0ms rustc 1.85.1
zig 1.zig 3697ms 9.3ms 1.4MB 3690ms 0ms zig 0.14.0
rust 2.rs 4212ms 3.9ms 2.0MB 4203ms 0ms rustc 1.85.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 128ms 0.3ms 2.3MB 467ms 3ms rustc 1.87.0-nightly
rust 7-m.rs 129ms 0.0ms 2.1MB 477ms 0ms rustc 1.85.1
rust 8.rs 251ms 0.9ms 2.1MB 240ms 0ms rustc 1.87.0-nightly
rust 2-m.rs 499ms 4.2ms 2.1MB 1907ms 0ms rustc 1.85.1
rust 7.rs 535ms 4.9ms 1.9MB 523ms 0ms rustc 1.85.1
zig 1.zig 925ms 2.3ms 1.3MB 917ms 0ms zig 0.14.0
rust 2.rs 1057ms 5.0ms 2.0MB 1043ms 0ms rustc 1.85.1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 36ms 0.2ms 2.3MB 107ms 0ms rustc 1.87.0-nightly
rust 7-m.rs 37ms 0.8ms 2.1MB 113ms 0ms rustc 1.85.1
rust 8.rs 65ms 0.4ms 2.0MB 60ms 0ms rustc 1.87.0-nightly
rust 2-m.rs 128ms 0.5ms 2.0MB 470ms 0ms rustc 1.85.1
rust 7.rs 136ms 2.4ms 1.9MB 130ms 0ms rustc 1.85.1
zig 1.zig 234ms 0.2ms 1.3MB 230ms 0ms zig 0.14.0
rust 2.rs 267ms 1.3ms 2.0MB 260ms 0ms rustc 1.85.1