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.)

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 395ms 1.4ms 2.6MB 1530ms 0ms g++ 11.4.0
cpp 1-im.cpp 401ms 9.4ms 3.9MB 1550ms 0ms clang++ 14.0.0-1ubuntu1.1
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
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
rust 1.rs 2686ms 8.1ms 1.8MB 2677ms 0ms rustc 1.85.1

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
cpp 1-im.cpp 41ms 1.0ms 3.9MB 130ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 43ms 4.4ms 2.4MB 137ms 0ms g++ 11.4.0
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
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
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

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.1ms 0.1ms 1.4MB 0ms 0ms g++ 11.4.0
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
cpp 1.cpp 1.4ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1

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
cpp 0-i.cpp 167ms 0.5ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.4ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
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
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
cpp 1.cpp 314ms 0.9ms 1.8MB 307ms 0ms g++ 11.4.0
cpp 1.cpp 316ms 1.6ms 2.3MB 310ms 0ms clang++ 14.0.0-1ubuntu1.1

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
cpp 0-i.cpp 19ms 0.1ms 1.5MB 10ms 0ms g++ 11.4.0
cpp 0-i.cpp 19ms 0.0ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
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
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
cpp 1.cpp 34ms 0.5ms 2.3MB 27ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.9ms 1.8MB 30ms 0ms g++ 11.4.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
cpp 1.cpp 481ms 2.1ms 7.3MB 470ms 0ms g++ 11.4.0
cpp 1.cpp 527ms 0.7ms 7.7MB 517ms 0ms clang++ 14.0.0-1ubuntu1.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
cpp 1.cpp 119ms 0.6ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 131ms 0.7ms 4.1MB 120ms 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
cpp 8-m.cpp 469ms 0.5ms 3.5MB 1817ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 492ms 15ms 2.1MB 1897ms 0ms g++ 11.4.0
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
cpp 6-im.cpp 921ms 2.1ms 3.4MB 3610ms 3ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 922ms 0.6ms 2.1MB 3630ms 0ms g++ 11.4.0
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
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
cpp 8-m.cpp 125ms 0.9ms 3.4MB 453ms 0ms clang++ 14.0.0-1ubuntu1.1
rust 8-m.rs 128ms 0.2ms 2.3MB 470ms 0ms rustc 1.88.0-nightly
cpp 8-m.cpp 129ms 1.9ms 2.0MB 483ms 0ms g++ 11.4.0
rust 7-m.rs 130ms 0.3ms 2.1MB 477ms 3ms rustc 1.85.1
cpp 6-im.cpp 240ms 2.2ms 2.0MB 923ms 0ms g++ 11.4.0
cpp 6-im.cpp 244ms 7.1ms 3.4MB 920ms 0ms clang++ 14.0.0-1ubuntu1.1
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
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
cpp 8-m.cpp 40ms 0.9ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 5.0ms 3.4MB 117ms 0ms clang++ 14.0.0-1ubuntu1.1
rust 8.rs 65ms 0.2ms 2.0MB 60ms 0ms rustc 1.88.0-nightly
cpp 6-im.cpp 66ms 0.6ms 3.4MB 227ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 68ms 1.1ms 2.0MB 243ms 0ms g++ 11.4.0
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
rust 2.rs 266ms 1.4ms 2.0MB 260ms 0ms rustc 1.85.1