Programming Language and compiler
Benchmarks

C 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.)

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 1.1ms 0.1ms 1.4MB 0ms 0ms zigcc 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
c 1.c 1.3ms 0.1ms 2.1MB 0ms 0ms gcc 14.2.0
c 1.c 1.3ms 0.0ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 175ms 4.6ms 23.9MB 417ms 3ms gcc 14.2.0
rust 8-m.rs 218ms 8.1ms 27.3MB 653ms 7ms rustc 1.85.1
c 1-m.c 288ms 1.1ms 25.8MB 987ms 23ms clang 14.0.0-1ubuntu1.1
rust 8.rs 475ms 8.3ms 22.3MB 453ms 3ms rustc 1.85.1

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 27ms 0.7ms 12.0MB 67ms 0ms gcc 14.2.0
rust 8-m.rs 31ms 2.4ms 15.6MB 63ms 0ms rustc 1.85.1
c 1-m.c 36ms 2.3ms 15.0MB 103ms 0ms clang 14.0.0-1ubuntu1.1
rust 8.rs 59ms 0.5ms 11.4MB 47ms 0ms rustc 1.85.1

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 212ms 6.2ms 7.4MB 793ms 13ms clang 14.0.0-1ubuntu1.1
rust 9.rs 246ms 0.3ms 4.8MB 237ms 0ms rustc 1.88.0-nightly
c 1-mffi.c 261ms 2.4ms 6.4MB 803ms 0ms gcc 14.2.0
rust 8.rs 310ms 0.8ms 4.7MB 300ms 0ms rustc 1.85.1
c 1-ffi.c 326ms 5.0ms 5.9MB 313ms 0ms zigcc 0.14.0
c 1-mffi.c 331ms 1.8ms 5.9MB 320ms 0ms zigcc 0.14.0
c 1-ffi.c 449ms 3.2ms 6.4MB 440ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 536ms 8.1ms 6.7MB 527ms 0ms gcc 14.2.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 13ms 0.7ms 1.9MB 10ms 0ms rustc 1.88.0-nightly
c 1-mffi.c 15ms 0.3ms 4.5MB 33ms 0ms clang 14.0.0-1ubuntu1.1
rust 8.rs 15ms 0.1ms 2.0MB 10ms 0ms rustc 1.85.1
c 1-ffi.c 16ms 0.0ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 16ms 0.3ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 17ms 0.6ms 3.6MB 40ms 0ms gcc 14.2.0
c 1-ffi.c 22ms 0.6ms 3.6MB 10ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 26ms 0.6ms 3.6MB 20ms 0ms gcc 14.2.0

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
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
c 8-i.c 273ms 4.4ms 1.5MB 263ms 0ms zigcc 0.14.0
rust 3.rs 279ms 1.1ms 1.9MB 270ms 0ms rustc 1.88.0-nightly
rust 2.rs 288ms 7.7ms 1.6MB 277ms 0ms rustc 1.85.1
c 8-i.c 302ms 1.2ms 2.1MB 293ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 311ms 1.2ms 2.3MB 300ms 0ms gcc 14.2.0
c 5.c 314ms 1.5ms 2.3MB 300ms 0ms gcc 14.2.0
c 2.c 315ms 1.9ms 1.5MB 310ms 0ms zigcc 0.14.0
c 5.c 316ms 0.5ms 2.1MB 307ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 316ms 1.1ms 1.5MB 310ms 0ms zigcc 0.14.0
c 2.c 318ms 2.1ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 332ms 0.8ms 2.3MB 323ms 0ms gcc 14.2.0

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
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
c 8-i.c 29ms 0.4ms 1.5MB 20ms 0ms zigcc 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
c 8-i.c 33ms 0.5ms 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 0.5ms 2.3MB 30ms 0ms gcc 14.2.0
c 2.c 34ms 1.0ms 2.3MB 27ms 0ms gcc 14.2.0
c 5.c 34ms 0.6ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 34ms 0.5ms 1.5MB 30ms 0ms zigcc 0.14.0
c 8-i.c 36ms 0.1ms 2.3MB 30ms 0ms gcc 14.2.0
c 2.c 37ms 2.6ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 252ms 2.1ms 41.0MB 237ms 0ms gcc 14.2.0
c 1.c 268ms 1.9ms 40.2MB 250ms 0ms zigcc 0.14.0
c 1.c 269ms 5.7ms 40.9MB 250ms 3ms clang 14.0.0-1ubuntu1.1
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

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 49ms 1.1ms 11.6MB 40ms 0ms gcc 14.2.0
c 1.c 53ms 2.9ms 11.5MB 40ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 57ms 3.1ms 11.0MB 47ms 0ms zigcc 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

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
c 6-im.c 951ms 9.5ms 2.0MB 3740ms 0ms gcc 14.2.0
c 4-m.c 968ms 1.5ms 2.0MB 3803ms 0ms gcc 14.2.0
rust 8.rs 992ms 0.2ms 2.4MB 980ms 0ms rustc 1.88.0-nightly
c 6-im.c 1003ms 0.8ms 3.3MB 3940ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1089ms 3.6ms 2.0MB 4287ms 3ms gcc 14.2.0
c 4-m.c 1129ms 14ms 3.3MB 4427ms 7ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1335ms 7.2ms 3.3MB 5240ms 7ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1849ms 16ms 3.4MB 7250ms 20ms clang 14.0.0-1ubuntu1.1
rust 2-m.rs 1956ms 1.0ms 2.3MB 7687ms 7ms rustc 1.85.1
c 3-m.c 1980ms 13ms 2.0MB 7780ms 3ms gcc 14.2.0
rust 7.rs 2115ms 12ms 1.9MB 2107ms 0ms rustc 1.85.1
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
c 6-im.c 248ms 5.1ms 2.0MB 953ms 0ms gcc 14.2.0
rust 8.rs 250ms 0.1ms 2.1MB 240ms 0ms rustc 1.88.0-nightly
c 4-m.c 253ms 1.6ms 2.0MB 967ms 0ms gcc 14.2.0
c 6-im.c 259ms 1.4ms 3.3MB 990ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 290ms 15ms 2.0MB 1103ms 0ms gcc 14.2.0
c 4-m.c 294ms 9.2ms 3.3MB 1117ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 351ms 17ms 3.4MB 1333ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 468ms 7.2ms 3.3MB 1807ms 0ms clang 14.0.0-1ubuntu1.1
rust 2-m.rs 494ms 0.3ms 2.1MB 1910ms 0ms rustc 1.85.1
c 3-m.c 496ms 2.9ms 2.0MB 1933ms 0ms gcc 14.2.0
rust 7.rs 532ms 3.6ms 1.9MB 520ms 0ms rustc 1.85.1
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
c 4-m.c 71ms 0.5ms 2.1MB 257ms 0ms gcc 14.2.0
c 6-im.c 73ms 2.6ms 3.3MB 250ms 0ms clang 14.0.0-1ubuntu1.1
c 6-im.c 73ms 6.2ms 2.0MB 257ms 0ms gcc 14.2.0
c 4-m.c 78ms 0.7ms 3.1MB 280ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 80ms 0.7ms 2.0MB 287ms 0ms gcc 14.2.0
c 5-im.c 93ms 0.7ms 3.3MB 330ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 124ms 1.1ms 3.1MB 453ms 0ms clang 14.0.0-1ubuntu1.1
rust 2-m.rs 128ms 0.3ms 2.1MB 470ms 3ms rustc 1.85.1
c 3-m.c 131ms 0.9ms 2.0MB 490ms 0ms gcc 14.2.0
rust 7.rs 136ms 1.7ms 1.9MB 130ms 0ms rustc 1.85.1
rust 2.rs 266ms 1.4ms 2.0MB 260ms 0ms rustc 1.85.1