Programming Language and compiler
Benchmarks

Zig VS Rust benchmarks

Current benchmark data was generated on Mon Mar 31 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 1282ms 16ms 33.6MB 1257ms 13ms rustc 1.85.1
rust 5.rs 1382ms 66ms 33.8MB 1363ms 10ms rustc 1.85.1
rust 3.rs 1548ms 45ms 49.8MB 1517ms 13ms rustc 1.85.1
zig 1.zig 1822ms 94ms 49.0MB 1787ms 20ms zig 0.14.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4.rs 121ms 2.0ms 5.6MB 110ms 0ms rustc 1.85.1
rust 5.rs 128ms 1.8ms 5.8MB 120ms 0ms rustc 1.85.1
rust 3.rs 143ms 4.2ms 7.8MB 130ms 0ms rustc 1.85.1
zig 1.zig 154ms 1.6ms 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 125ms 1.3ms 3.6MB 117ms 0ms rustc 1.85.1
rust 2.rs 425ms 2.1ms 3.6MB 413ms 0ms rustc 1.85.1
zig 1.zig 2250ms 2.7ms 2.5MB 2220ms 13ms zig 0.14.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 34ms 0.8ms 2.9MB 30ms 0ms rustc 1.85.1
rust 2.rs 77ms 1.2ms 3.0MB 70ms 0ms rustc 1.85.1
zig 1.zig 380ms 1.3ms 1.9MB 360ms 0ms 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 411ms 1.2ms 2.0MB 1577ms 0ms rustc 1.85.1
rust 5-m.rs 579ms 2.2ms 2.1MB 2190ms 0ms rustc 1.85.1
rust 2-im.rs 631ms 4.5ms 2.0MB 2410ms 0ms rustc 1.85.1
zig 2-m.zig 634ms 1.8ms 1.4MB 2393ms 0ms zig 0.14.0
rust 1-m.rs 979ms 7.0ms 2.1MB 3770ms 0ms rustc 1.85.1
rust 3-i.rs 1497ms 1.1ms 1.9MB 1490ms 0ms rustc 1.85.1
rust 2-i.rs 1759ms 3.1ms 1.8MB 1750ms 0ms rustc 1.85.1
zig 3-i.zig 1767ms 0.8ms 1.0MB 1760ms 0ms zig 0.14.0
rust 1.rs 2686ms 8.1ms 1.8MB 2677ms 0ms rustc 1.85.1
zig 1.zig 2716ms 0.8ms 1.0MB 2710ms 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 0.1ms 2.1MB 120ms 0ms rustc 1.85.1
rust 5-m.rs 54ms 0.8ms 2.0MB 180ms 0ms rustc 1.85.1
rust 2-im.rs 60ms 0.1ms 2.1MB 200ms 0ms rustc 1.85.1
zig 2-m.zig 60ms 0.8ms 1.4MB 200ms 0ms zig 0.14.0
rust 1-m.rs 87ms 1.4ms 2.0MB 307ms 0ms rustc 1.85.1
rust 3-i.rs 125ms 0.5ms 1.9MB 120ms 0ms rustc 1.85.1
zig 3-i.zig 147ms 0.6ms 1.0MB 140ms 0ms zig 0.14.0
rust 2-i.rs 150ms 1.0ms 1.8MB 140ms 0ms rustc 1.85.1
rust 1.rs 228ms 0.7ms 1.8MB 220ms 0ms rustc 1.85.1
zig 1.zig 229ms 0.5ms 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 89ms 0.3ms 1.0MB 80ms 0ms zig 0.14.0
rust 5c-m.rs 89ms 0.4ms 3.4MB 263ms 0ms rustc 1.85.1
rust 5-m.rs 94ms 0.1ms 3.4MB 293ms 0ms rustc 1.85.1
rust 6.rs 144ms 0.4ms 1.9MB 140ms 0ms rustc 1.85.1
rust 1c.rs 163ms 0.5ms 1.9MB 150ms 0ms rustc 1.85.1
rust 1.rs 195ms 1.3ms 1.9MB 180ms 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 1.1MB 0ms 0ms zig 0.14.0
rust 5c-m.rs 16ms 0.5ms 3.4MB 20ms 0ms rustc 1.85.1
rust 5-m.rs 17ms 0.1ms 3.2MB 30ms 0ms rustc 1.85.1
rust 6.rs 17ms 0.8ms 1.9MB 10ms 0ms rustc 1.85.1
rust 1c.rs 18ms 0.1ms 1.9MB 10ms 0ms rustc 1.85.1
rust 1.rs 22ms 0.2ms 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 1.0MB 0ms 0ms zig 0.14.0
rust 1.rs 1.3ms 0.1ms 1.8MB 0ms 0ms rustc 1.88.0-nightly
rust 1.rs 1.3ms 0.0ms 1.9MB 0ms 0ms rustc 1.85.1

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 218ms 8.1ms 27.3MB 653ms 7ms rustc 1.85.1
rust 8.rs 475ms 8.3ms 22.3MB 453ms 3ms rustc 1.85.1
zig 1.zig 499ms 8.5ms 26.3MB 477ms 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 31ms 2.4ms 15.6MB 63ms 0ms rustc 1.85.1
rust 8.rs 59ms 0.5ms 11.4MB 47ms 0ms rustc 1.85.1
zig 1.zig 66ms 2.2ms 15.4MB 53ms 3ms 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 34ms 0.8ms 2.8MB 27ms 0ms zig 0.14.0
rust 0-unsafe.rs 35ms 3.5ms 1.9MB 27ms 0ms rustc 1.85.1
rust 1.rs 45ms 3.2ms 2.0MB 33ms 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 92ms 0.9ms 2.8MB 83ms 0ms zig 0.14.0
rust 0-unsafe.rs 135ms 20ms 1.9MB 130ms 0ms rustc 1.85.1
rust 1.rs 181ms 13ms 2.0MB 173ms 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 0.7ms 1.3MB 10ms 0ms zig 0.14.0
rust 0-unsafe.rs 26ms 2.8ms 1.9MB 20ms 0ms rustc 1.85.1
rust 1.rs 30ms 0.8ms 1.9MB 20ms 0ms rustc 1.85.1

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 246ms 0.3ms 4.8MB 237ms 0ms rustc 1.88.0-nightly
zig 1.zig 247ms 2.2ms 4.0MB 237ms 0ms zig 0.14.0
rust 8.rs 310ms 0.8ms 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 0.4ms 1.1MB 0ms 0ms zig 0.14.0
rust 9.rs 13ms 0.7ms 1.9MB 10ms 0ms rustc 1.88.0-nightly
rust 8.rs 15ms 0.1ms 2.0MB 10ms 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 722ms 31ms 33.8MB 697ms 10ms rustc 1.85.1
zig 1.zig 855ms 3.1ms 41.0MB 827ms 13ms zig 0.14.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 156ms 2.0ms 9.8MB 143ms 0ms rustc 1.85.1
zig 1.zig 173ms 2.3ms 11.0MB 160ms 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 166ms 3.3ms 1.9MB 160ms 0ms rustc 1.85.1
zig 3.zig 199ms 0.7ms 1.0MB 190ms 0ms zig 0.14.0
rust 7-i.rs 239ms 0.9ms 1.9MB 230ms 0ms rustc 1.85.1
rust 1.rs 239ms 1.0ms 1.8MB 230ms 0ms rustc 1.85.1
rust 3.rs 279ms 1.1ms 1.9MB 270ms 0ms rustc 1.88.0-nightly
zig 2.zig 279ms 0.3ms 1.0MB 270ms 0ms zig 0.14.0
rust 2.rs 288ms 7.7ms 1.6MB 277ms 0ms rustc 1.85.1
zig 1.zig 316ms 1.3ms 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 18ms 0.0ms 1.8MB 10ms 0ms rustc 1.85.1
zig 3.zig 22ms 0.3ms 1.0MB 10ms 0ms zig 0.14.0
rust 7-i.rs 26ms 0.5ms 1.8MB 20ms 0ms rustc 1.85.1
rust 1.rs 27ms 0.5ms 1.9MB 20ms 0ms rustc 1.85.1
zig 2.zig 30ms 0.2ms 1.0MB 20ms 0ms zig 0.14.0
rust 3.rs 30ms 0.2ms 1.8MB 20ms 0ms rustc 1.88.0-nightly
rust 2.rs 32ms 2.7ms 1.6MB 23ms 0ms rustc 1.85.1
zig 1.zig 34ms 0.4ms 1.1MB 30ms 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 263ms 1.5ms 40.1MB 250ms 0ms zig 0.14.0
rust 1.rs 302ms 4.2ms 40.9MB 287ms 0ms rustc 1.85.1
rust 2.rs 314ms 1.2ms 6.6MB 300ms 0ms rustc 1.85.1
zig 2.zig 322ms 3.8ms 6.0MB 313ms 0ms zig 0.14.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 52ms 1.4ms 10.8MB 40ms 0ms zig 0.14.0
rust 1.rs 59ms 3.1ms 11.6MB 50ms 0ms rustc 1.85.1
rust 2.rs 79ms 0.9ms 2.9MB 70ms 0ms rustc 1.85.1
zig 2.zig 81ms 1.3ms 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 1532ms 5.5ms 2.8MB 1317ms 197ms rustc 1.85.1
rust 2.rs 1717ms 5.8ms 2.7MB 1630ms 73ms rustc 1.85.1
zig 1.zig 2465ms 18ms 2.2MB 2437ms 13ms zig 0.14.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 326ms 6.3ms 2.4MB 303ms 7ms rustc 1.85.1
rust 2.rs 388ms 2.0ms 2.4MB 380ms 0ms rustc 1.85.1
zig 1.zig 569ms 2.6ms 1.6MB 560ms 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 495ms 3.5ms 2.5MB 1890ms 7ms rustc 1.88.0-nightly
rust 7-m.rs 502ms 0.8ms 2.1MB 1930ms 3ms rustc 1.85.1
rust 8.rs 992ms 0.2ms 2.4MB 980ms 0ms rustc 1.88.0-nightly
rust 2-m.rs 1956ms 1.0ms 2.3MB 7687ms 7ms rustc 1.85.1
rust 7.rs 2115ms 12ms 1.9MB 2107ms 0ms rustc 1.85.1
zig 1.zig 3705ms 29ms 1.4MB 3693ms 0ms zig 0.14.0
rust 2.rs 4212ms 7.3ms 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 0.2ms 2.3MB 470ms 0ms rustc 1.88.0-nightly
rust 7-m.rs 130ms 0.3ms 2.1MB 477ms 3ms rustc 1.85.1
rust 8.rs 250ms 0.1ms 2.1MB 240ms 0ms rustc 1.88.0-nightly
rust 2-m.rs 494ms 0.3ms 2.1MB 1910ms 0ms rustc 1.85.1
rust 7.rs 532ms 3.6ms 1.9MB 520ms 0ms rustc 1.85.1
zig 1.zig 922ms 1.2ms 1.3MB 910ms 0ms zig 0.14.0
rust 2.rs 1057ms 2.8ms 2.0MB 1047ms 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 0.4ms 2.3MB 107ms 0ms rustc 1.88.0-nightly
rust 7-m.rs 36ms 0.1ms 2.0MB 113ms 0ms rustc 1.85.1
rust 8.rs 65ms 0.2ms 2.0MB 60ms 0ms rustc 1.88.0-nightly
rust 2-m.rs 128ms 0.3ms 2.1MB 470ms 3ms rustc 1.85.1
rust 7.rs 136ms 1.7ms 1.9MB 130ms 0ms rustc 1.85.1
zig 1.zig 234ms 0.8ms 1.3MB 223ms 0ms zig 0.14.0
rust 2.rs 266ms 1.4ms 2.0MB 260ms 0ms rustc 1.85.1