Programming Language and compiler
Benchmarks

C++ VS Python benchmarks

Current benchmark data was generated on Sun Jun 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 396ms 4.5ms 2.5MB 1533ms 0ms g++ 11.4.0
cpp 1-im.cpp 402ms 5.0ms 4.0MB 1557ms 0ms clang++ 14.0.0-1ubuntu1.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 40ms 0.6ms 4.0MB 130ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 40ms 2.9ms 2.5MB 133ms 0ms g++ 11.4.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.0ms 0.0ms 1.4MB 0ms 0ms g++ 11.4.0
cpp 1.cpp 1.4ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
python 1.py 12ms 0.9ms 7.6MB 0ms 0ms pyston 3.8.12
python 1.py 14ms 1.3ms 8.6MB 10ms 0ms cpython 3.13.3
python 1.py 29ms 1.0ms 51.7MB 10ms 8ms pypy 3.10.16

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 167ms 0.4ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.7ms 2.4MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 314ms 2.2ms 1.8MB 303ms 0ms g++ 11.4.0
cpp 1.cpp 318ms 0.4ms 2.3MB 310ms 0ms clang++ 14.0.0-1ubuntu1.1
python 2.py 1361ms 8.4ms 60.3MB 1333ms 10ms pypy 3.10.16
python 1.py 2648ms 10ms 57.1MB 2623ms 10ms pypy 3.10.16
python 1.py timeout 0.0ms 8.9MB 4990ms 0ms cpython 3.13.3
python 2.py timeout 0.0ms 8.9MB 4990ms 0ms cpython 3.13.3
python 1.py timeout 0.0ms 8.3MB 4990ms 0ms pyston 3.8.12
python 2.py timeout 0.0ms 8.1MB 4990ms 0ms pyston 3.8.12

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 18ms 0.0ms 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 34ms 0.4ms 1.9MB 30ms 0ms g++ 11.4.0
cpp 1.cpp 34ms 0.1ms 2.3MB 23ms 0ms clang++ 14.0.0-1ubuntu1.1
python 2.py 180ms 3.2ms 58.1MB 153ms 13ms pypy 3.10.16
python 1.py 303ms 4.6ms 57.1MB 280ms 10ms pypy 3.10.16
python 1.py 943ms 20ms 8.3MB 933ms 0ms pyston 3.8.12
python 2.py 1311ms 6.8ms 8.3MB 1300ms 0ms pyston 3.8.12
python 1.py 3029ms 49ms 8.9MB 3017ms 0ms cpython 3.13.3
python 2.py 3194ms 81ms 8.9MB 3183ms 0ms cpython 3.13.3

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 485ms 1.3ms 7.3MB 473ms 0ms g++ 11.4.0
cpp 1.cpp 526ms 2.2ms 7.8MB 517ms 0ms clang++ 14.0.0-1ubuntu1.1
python 1.py 2510ms 35ms 369.7MB 2443ms 53ms pypy 3.10.16
python 2.py 3001ms 11ms 632.9MB 2817ms 167ms pyston 3.8.12
python 1.py 4815ms 106ms 320.4MB 4753ms 47ms pyston 3.8.12
python 1.py timeout 0.0ms 321.4MB 4960ms 23ms cpython 3.13.3
python 2.py timeout 0.0ms 633.8MB 4820ms 160ms cpython 3.13.3
python 2.py timeout 0.0ms 959.9MB 4717ms 273ms pypy 3.10.16

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 120ms 1.4ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 131ms 0.7ms 4.0MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
python 1.py 534ms 6.8ms 135.3MB 497ms 20ms pypy 3.10.16
python 2.py 727ms 14ms 164.2MB 683ms 27ms pyston 3.8.12
python 1.py 1059ms 9.9ms 86.0MB 1033ms 10ms pyston 3.8.12
python 2.py 1436ms 9.3ms 165.0MB 1393ms 27ms cpython 3.13.3
python 2.py 1518ms 1.3ms 290.1MB 1430ms 73ms pypy 3.10.16
python 1.py 2777ms 67ms 87.0MB 2753ms 10ms cpython 3.13.3

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 469ms 3.7ms 3.5MB 1823ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 482ms 1.3ms 2.1MB 1887ms 0ms g++ 11.4.0
cpp 6-im.cpp 917ms 0.3ms 3.4MB 3603ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 920ms 1.7ms 2.1MB 3617ms 0ms g++ 11.4.0
python 8.py timeout 0.0ms 14.8MB 40ms 10ms cpython 3.13.3
python 8.py timeout 0.0ms 95.2MB 787ms 80ms pypy 3.10.16
python 8.py timeout 0.0ms 14.2MB 37ms 10ms pyston 3.8.12

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 123ms 0.4ms 3.4MB 457ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 0.5ms 2.0MB 480ms 0ms g++ 11.4.0
cpp 6-im.cpp 236ms 0.8ms 3.4MB 900ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 238ms 0.2ms 2.1MB 920ms 0ms g++ 11.4.0
python 8.py timeout 0.0ms 14.6MB 50ms 10ms cpython 3.13.3
python 8.py timeout 0.0ms 96.8MB 1343ms 173ms pypy 3.10.16
python 8.py timeout 0.0ms 13.6MB 53ms 23ms pyston 3.8.12

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 39ms 0.4ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 8.7ms 3.5MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 65ms 1.3ms 3.4MB 230ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 66ms 0.2ms 2.0MB 240ms 0ms g++ 11.4.0
python 8-m.py 1961ms 11ms 93.0MB 6377ms 250ms pypy 3.10.16
python 8.py timeout 0.0ms 14.3MB 90ms 17ms cpython 3.13.3
python 8.py timeout 0.0ms 13.2MB 153ms 37ms pyston 3.8.12