Programming Language and compiler
Benchmarks

Nim VS C++ benchmarks

Current benchmark data was generated on Mon May 19 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
nim 2.nim 836ms 40ms 34.9MB 817ms 7ms nim 2.2.4
nim 2.nim 971ms 5.9ms 35.2MB 953ms 3ms nim/clang 2.2.4

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 77ms 1.2ms 5.5MB 70ms 0ms nim 2.2.4
nim 2.nim 93ms 2.7ms 5.8MB 80ms 0ms nim/clang 2.2.4

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim timeout 0.0ms 575.4MB 2623ms 1900ms nim 2.2.4
nim 1.nim timeout 0.0ms 575.7MB 2560ms 1967ms nim/clang 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 4094ms 5.6ms 519.3MB 2117ms 1553ms nim 2.2.4
nim 1.nim 4109ms 27ms 518.7MB 2100ms 1580ms nim/clang 2.2.4

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 188ms 2.8ms 1.5MB 180ms 0ms nim 2.2.4
nim 2.nim 243ms 2.1ms 1.8MB 230ms 0ms nim/clang 2.2.4
nim 1.nim 533ms 0.9ms 1.8MB 453ms 67ms nim/clang 2.2.4
nim 1.nim 557ms 2.9ms 1.5MB 470ms 73ms nim 2.2.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 22ms 0.7ms 1.5MB 10ms 0ms nim 2.2.4
nim 2.nim 27ms 1.0ms 1.8MB 20ms 0ms nim/clang 2.2.4
nim 1.nim 56ms 0.8ms 1.8MB 43ms 0ms nim/clang 2.2.4
nim 1.nim 59ms 1.8ms 1.5MB 40ms 3ms nim 2.2.4

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1.0ms 0.0ms 1.6MB 0ms 0ms nim 2.2.4
cpp 1.cpp 1.0ms 0.0ms 1.4MB 0ms 0ms g++ 11.4.0
nim 1.nim 1.1ms 0.0ms 1.9MB 0ms 0ms nim/clang 2.2.4
cpp 1.cpp 1.3ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 110ms 1.5ms 1.6MB 100ms 0ms nim/clang 2.2.4
nim 2.nim 114ms 1.4ms 1.4MB 107ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.4

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 325ms 2.6ms 1.6MB 317ms 0ms nim/clang 2.2.4
nim 2.nim 336ms 4.1ms 1.4MB 327ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.4

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 50ms 1.8ms 1.5MB 40ms 0ms nim/clang 2.2.4
nim 2.nim 52ms 1.0ms 1.3MB 43ms 0ms nim 2.2.4
nim 1.nim 482ms 4.8ms 1.3MB 477ms 0ms nim 2.2.4
nim 1.nim 488ms 14ms 1.5MB 477ms 0ms nim/clang 2.2.4

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 387ms 0.4ms 4.8MB 380ms 0ms nim/clang 2.2.4
nim 1.nim 576ms 1.5ms 4.5MB 563ms 0ms nim 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 19ms 0.5ms 1.9MB 10ms 0ms nim/clang 2.2.4
nim 1.nim 27ms 1.2ms 1.6MB 20ms 0ms nim 2.2.4

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 552ms 1.9ms 34.9MB 530ms 7ms nim 2.2.4
nim 1.nim 634ms 34ms 35.2MB 613ms 10ms nim/clang 2.2.4

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 120ms 2.4ms 9.6MB 110ms 0ms nim 2.2.4
nim 1.nim 135ms 2.2ms 9.9MB 123ms 0ms nim/clang 2.2.4

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 167ms 0.5ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.2ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 313ms 0.2ms 1.8MB 303ms 0ms g++ 11.4.0
nim 2.nim 319ms 1.7ms 1.8MB 310ms 0ms nim 2.2.4
cpp 1.cpp 331ms 25ms 2.3MB 323ms 0ms clang++ 14.0.0-1ubuntu1.1
nim 2.nim 340ms 0.5ms 2.0MB 330ms 0ms nim/clang 2.2.4

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 19ms 0.1ms 1.5MB 10ms 0ms g++ 11.4.0
cpp 0-i.cpp 19ms 0.2ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.4ms 1.8MB 30ms 0ms g++ 11.4.0
cpp 1.cpp 34ms 0.3ms 2.3MB 30ms 0ms clang++ 14.0.0-1ubuntu1.1
nim 2.nim 35ms 1.0ms 1.8MB 30ms 0ms nim 2.2.4
nim 2.nim 40ms 6.2ms 2.0MB 33ms 0ms nim/clang 2.2.4

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 267ms 0.8ms 41.5MB 253ms 0ms nim 2.2.4
nim 1.nim 314ms 3.5ms 41.8MB 303ms 0ms nim/clang 2.2.4
cpp 1.cpp 494ms 10ms 7.3MB 483ms 0ms g++ 11.4.0
cpp 1.cpp 529ms 1.4ms 7.7MB 520ms 0ms clang++ 14.0.0-1ubuntu1.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 51ms 1.1ms 11.6MB 40ms 0ms nim 2.2.4
nim 1.nim 63ms 1.6ms 11.8MB 53ms 0ms nim/clang 2.2.4
cpp 1.cpp 121ms 1.4ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 132ms 0.8ms 4.1MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1651ms 5.5ms 151.9MB 1620ms 13ms nim/clang 2.2.4
nim 1.nim 1683ms 16ms 152.1MB 1650ms 20ms nim 2.2.4

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 174ms 3.4ms 17.6MB 160ms 0ms nim/clang 2.2.4
nim 1.nim 176ms 3.6ms 17.2MB 163ms 0ms nim 2.2.4

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 470ms 2.9ms 3.4MB 1823ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 483ms 0.4ms 2.1MB 1880ms 0ms g++ 11.4.0
cpp 6-im.cpp 925ms 8.4ms 2.3MB 3630ms 0ms g++ 11.4.0
cpp 6-im.cpp 926ms 13ms 3.4MB 3623ms 0ms clang++ 14.0.0-1ubuntu1.1
nim 1.nim 3587ms 2.7ms 1.6MB 3580ms 0ms nim/clang 2.2.4
nim 1.nim 3610ms 12ms 1.4MB 3597ms 0ms nim 2.2.4

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 124ms 0.4ms 3.4MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 1.3ms 2.0MB 477ms 0ms g++ 11.4.0
cpp 6-im.cpp 238ms 1.4ms 3.4MB 907ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 253ms 24ms 2.0MB 953ms 0ms g++ 11.4.0
nim 1.nim 899ms 0.8ms 1.5MB 890ms 0ms nim/clang 2.2.4
nim 1.nim 902ms 1.4ms 1.3MB 893ms 0ms nim 2.2.4

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 40ms 0.5ms 2.0MB 133ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 7.1ms 3.5MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 65ms 0.5ms 3.5MB 223ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 68ms 1.0ms 2.0MB 243ms 0ms g++ 11.4.0
nim 1.nim 226ms 0.1ms 1.5MB 220ms 0ms nim/clang 2.2.4
nim 1.nim 229ms 1.9ms 1.3MB 220ms 0ms nim 2.2.4