Programming Language and compiler
Benchmarks

C++ VS Wasm benchmarks

Current benchmark data was generated on Fri Aug 01 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 401ms 5.2ms 3.9MB 1553ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 402ms 3.8ms 2.6MB 1547ms 0ms g++ 11.4.0
wasm 1.rs 4146ms 2.1ms 17.3MB 4133ms 0ms wasmtime 35.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 39ms 1.2ms 2.5MB 127ms 0ms g++ 11.4.0
cpp 1-im.cpp 40ms 1.1ms 3.9MB 133ms 0ms clang++ 14.0.0-1ubuntu1.1
wasm 1.rs 348ms 0.1ms 17.4MB 340ms 0ms wasmtime 35.0.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.0ms 0.1ms 1.4MB 0ms 0ms g++ 11.4.0
cpp 1.cpp 1.3ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
wasm 1.rs 6.4ms 0.3ms 18.0MB 0ms 0ms wasmtime 35.0.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 167ms 0.3ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.3ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 315ms 1.4ms 2.3MB 307ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 316ms 0.7ms 1.9MB 307ms 0ms g++ 11.4.0
wasm 1.rs 410ms 1.4ms 17.8MB 400ms 0ms wasmtime 35.0.0
wasm 2.rs 565ms 5.2ms 17.9MB 553ms 0ms wasmtime 35.0.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 18ms 0.1ms 1.5MB 10ms 0ms g++ 11.4.0
cpp 0-i.cpp 19ms 0.1ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 33ms 0.1ms 1.8MB 23ms 0ms g++ 11.4.0
cpp 1.cpp 33ms 0.1ms 2.3MB 30ms 0ms clang++ 14.0.0-1ubuntu1.1
wasm 1.rs 48ms 0.9ms 17.8MB 40ms 0ms wasmtime 35.0.0
wasm 2.rs 65ms 1.2ms 17.8MB 50ms 0ms wasmtime 35.0.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 385ms 7.3ms 22.7MB 370ms 0ms wasmtime 35.0.0
wasm 1.rs 450ms 3.8ms 56.9MB 437ms 0ms wasmtime 35.0.0
cpp 1.cpp 485ms 0.9ms 7.3MB 470ms 0ms g++ 11.4.0
cpp 1.cpp 531ms 2.8ms 7.8MB 520ms 0ms clang++ 14.0.0-1ubuntu1.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 92ms 1.1ms 27.5MB 80ms 0ms wasmtime 35.0.0
wasm 2.rs 99ms 0.8ms 19.1MB 90ms 0ms wasmtime 35.0.0
cpp 1.cpp 121ms 1.9ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 131ms 1.3ms 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 3.9ms 3.4MB 1827ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 482ms 1.0ms 2.4MB 1887ms 0ms g++ 11.4.0
cpp 6-im.cpp 926ms 10ms 2.3MB 3637ms 0ms g++ 11.4.0
cpp 6-im.cpp 935ms 18ms 3.4MB 3647ms 0ms clang++ 14.0.0-1ubuntu1.1
wasm 7.rs 3602ms 3.8ms 18.1MB 3590ms 0ms wasmtime 35.0.0
wasm 2.rs 3607ms 9.5ms 17.8MB 3590ms 0ms wasmtime 35.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 123ms 0.7ms 3.4MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 0.6ms 2.0MB 483ms 0ms g++ 11.4.0
cpp 6-im.cpp 237ms 1.4ms 3.4MB 903ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 239ms 2.4ms 2.0MB 913ms 0ms g++ 11.4.0
wasm 2.rs 905ms 0.6ms 17.4MB 890ms 0ms wasmtime 35.0.0
wasm 7.rs 909ms 1.9ms 17.6MB 897ms 0ms wasmtime 35.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 37ms 1.4ms 3.4MB 110ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 39ms 0.4ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 6-im.cpp 64ms 0.1ms 3.4MB 227ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 66ms 0.6ms 2.1MB 237ms 0ms g++ 11.4.0
wasm 7.rs 233ms 1.0ms 17.8MB 220ms 0ms wasmtime 35.0.0
wasm 2.rs 234ms 1.7ms 17.3MB 220ms 0ms wasmtime 35.0.0