Programming Language and compiler
Benchmarks

Nim VS Python 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.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 951ms 22ms 34.6MB 933ms 0ms nim 2.2.2
nim 2.nim 1044ms 46ms 34.9MB 1030ms 0ms nim/clang 2.2.2
python 1.py 1210ms 7.0ms 96.2MB 1147ms 47ms pypy 3.10.16
python 1.py timeout 0.0ms 40.8MB 4963ms 20ms cpython 3.13.2
python 1.py timeout 0.0ms 40.5MB 4747ms 240ms pyston 3.8.12

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 91ms 1.0ms 5.5MB 80ms 0ms nim 2.2.2
nim 2.nim 92ms 1.1ms 5.8MB 80ms 0ms nim/clang 2.2.2
python 1.py 95ms 1.1ms 68.8MB 67ms 17ms pypy 3.10.16
python 1.py 479ms 4.3ms 11.9MB 453ms 10ms pyston 3.8.12
python 1.py 718ms 7.5ms 12.6MB 703ms 0ms cpython 3.13.2

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 1217ms 27ms 107.0MB 1170ms 30ms pypy 3.10.16
python 1.py 2643ms 6.3ms 25.0MB 2620ms 13ms cpython 3.13.2
nim 1.nim timeout 0.0ms 553.5MB 2527ms 2017ms nim 2.2.2
nim 1.nim timeout 0.0ms 555.8MB 2507ms 2037ms nim/clang 2.2.2
python 1.py timeout 0.0ms 17.3MB 4980ms 7ms pyston 3.8.12

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
python 1.py 224ms 3.9ms 86.3MB 190ms 20ms pypy 3.10.16
python 1.py 228ms 1.1ms 20.2MB 207ms 10ms cpython 3.13.2
python 1.py 685ms 12ms 16.8MB 667ms 7ms pyston 3.8.12
nim 1.nim 4347ms 12ms 519.8MB 2150ms 1773ms nim/clang 2.2.2
nim 1.nim 4379ms 10ms 519.4MB 2190ms 1760ms nim 2.2.2

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 189ms 2.4ms 1.5MB 177ms 0ms nim 2.2.2
nim 2.nim 237ms 2.8ms 1.8MB 227ms 0ms nim/clang 2.2.2
nim 1.nim 553ms 0.6ms 1.8MB 447ms 90ms nim/clang 2.2.2
nim 1.nim 579ms 2.1ms 1.5MB 477ms 87ms nim 2.2.2
python 1.py 1852ms 1.6ms 88.8MB 1807ms 30ms pypy 3.10.16
python 5-m.py 2282ms 30ms 65.4MB 3493ms 843ms pypy 3.10.16
python 5-m.py 2455ms 13ms 12.5MB 3537ms 1010ms pyston 3.8.12
python 1.py 3017ms 14ms 8.1MB 3007ms 0ms pyston 3.8.12
python 5-m.py 3351ms 11ms 13.5MB 4443ms 913ms cpython 3.13.2
python 1.py 4656ms 26ms 8.8MB 4640ms 0ms cpython 3.13.2

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 21ms 0.0ms 1.5MB 10ms 0ms nim 2.2.2
nim 2.nim 26ms 0.2ms 1.8MB 20ms 0ms nim/clang 2.2.2
nim 1.nim 59ms 1.2ms 1.8MB 40ms 10ms nim/clang 2.2.2
nim 1.nim 61ms 0.5ms 1.5MB 40ms 7ms nim 2.2.2
python 1.py 251ms 5.7ms 63.3MB 223ms 13ms pypy 3.10.16
python 5-m.py 311ms 1.4ms 12.4MB 393ms 143ms pyston 3.8.12
python 1.py 318ms 0.3ms 8.1MB 310ms 0ms pyston 3.8.12
python 5-m.py 397ms 5.6ms 13.6MB 480ms 133ms cpython 3.13.2
python 5-m.py 445ms 6.3ms 65.4MB 737ms 310ms pypy 3.10.16
python 1.py 488ms 7.2ms 8.6MB 477ms 0ms cpython 3.13.2

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1.1ms 0.0ms 1.5MB 0ms 0ms nim 2.2.2
nim 1.nim 1.2ms 0.0ms 1.9MB 0ms 0ms nim/clang 2.2.2
python 1.py 11ms 0.5ms 7.6MB 0ms 0ms pyston 3.8.12
python 1.py 14ms 1.0ms 8.6MB 10ms 0ms cpython 3.13.2
python 1.py 29ms 1.1ms 51.6MB 10ms 10ms pypy 3.10.16

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 111ms 1.6ms 1.6MB 100ms 0ms nim/clang 2.2.2
nim 2.nim 113ms 2.6ms 1.4MB 103ms 0ms nim 2.2.2
python 2.py 144ms 0.5ms 58.3MB 120ms 10ms pypy 3.10.16
python 1.py 179ms 2.6ms 59.4MB 157ms 10ms pypy 3.10.16
python 1.py 719ms 5.8ms 8.9MB 707ms 0ms pyston 3.8.12
python 2.py 833ms 11ms 8.5MB 820ms 0ms pyston 3.8.12
python 1.py 1138ms 4.4ms 9.4MB 1127ms 0ms cpython 3.13.2
python 2.py 1348ms 40ms 9.0MB 1337ms 0ms cpython 3.13.2
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.2
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.2

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 324ms 1.9ms 1.6MB 313ms 0ms nim/clang 2.2.2
nim 2.nim 326ms 1.9ms 1.6MB 320ms 0ms nim 2.2.2
python 2.py 338ms 2.7ms 59.3MB 320ms 3ms pypy 3.10.16
python 1.py 380ms 6.1ms 60.3MB 353ms 10ms pypy 3.10.16
python 1.py 2132ms 18ms 8.9MB 2123ms 0ms pyston 3.8.12
python 2.py 2501ms 6.7ms 8.5MB 2490ms 0ms pyston 3.8.12
python 1.py 3370ms 28ms 9.4MB 3357ms 0ms cpython 3.13.2
python 2.py 3950ms 27ms 9.0MB 3937ms 0ms cpython 3.13.2
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.2
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.2

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 50ms 1.1ms 1.3MB 40ms 0ms nim 2.2.2
nim 2.nim 50ms 0.7ms 1.6MB 40ms 0ms nim/clang 2.2.2
python 2.py 106ms 5.2ms 57.9MB 83ms 10ms pypy 3.10.16
python 1.py 122ms 1.9ms 58.7MB 100ms 10ms pypy 3.10.16
python 1.py 348ms 6.0ms 8.5MB 333ms 0ms pyston 3.8.12
python 2.py 387ms 2.2ms 8.1MB 373ms 0ms pyston 3.8.12
nim 1.nim 440ms 2.2ms 1.5MB 430ms 0ms nim/clang 2.2.2
nim 1.nim 481ms 0.8ms 1.3MB 470ms 0ms nim 2.2.2
python 1.py 539ms 4.9ms 9.0MB 523ms 0ms cpython 3.13.2
python 2.py 634ms 5.0ms 8.6MB 623ms 0ms cpython 3.13.2

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 388ms 0.9ms 4.7MB 380ms 0ms nim/clang 2.2.2
nim 1.nim 579ms 3.4ms 4.4MB 570ms 0ms nim 2.2.2

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 19ms 0.3ms 1.9MB 10ms 0ms nim/clang 2.2.2
nim 1.nim 26ms 0.4ms 1.6MB 20ms 0ms nim 2.2.2

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 534ms 2.9ms 34.6MB 517ms 0ms nim 2.2.2
nim 1.nim 631ms 20ms 34.9MB 613ms 3ms nim/clang 2.2.2
python 1.py 2202ms 10ms 203.1MB 2083ms 107ms pypy 3.10.16
python 1.py timeout 0.0ms 93.9MB 4950ms 40ms cpython 3.13.2
python 1.py timeout 0.0ms 130.4MB 4940ms 50ms pyston 3.8.12

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 114ms 2.7ms 9.6MB 100ms 0ms nim 2.2.2
nim 1.nim 135ms 3.0ms 9.9MB 123ms 0ms nim/clang 2.2.2
python 1.py 377ms 5.4ms 105.2MB 323ms 40ms pypy 3.10.16
python 1.py 3111ms 151ms 37.2MB 3083ms 13ms cpython 3.13.2
python 1.py timeout 0.0ms 48.9MB 4940ms 43ms pyston 3.8.12

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 319ms 1.2ms 1.8MB 310ms 0ms nim 2.2.2
nim 2.nim 342ms 0.5ms 2.0MB 330ms 0ms nim/clang 2.2.2
python 2.py 1353ms 7.7ms 60.3MB 1330ms 10ms pypy 3.10.16
python 1.py 2647ms 8.4ms 57.2MB 2623ms 10ms pypy 3.10.16
python 1.py timeout 0.0ms 8.6MB 4990ms 0ms cpython 3.13.2
python 2.py timeout 0.0ms 8.8MB 4990ms 0ms cpython 3.13.2
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
nim 2.nim 34ms 0.6ms 1.8MB 27ms 0ms nim 2.2.2
nim 2.nim 37ms 1.4ms 2.0MB 30ms 0ms nim/clang 2.2.2
python 2.py 182ms 1.3ms 58.1MB 160ms 10ms pypy 3.10.16
python 1.py 299ms 2.7ms 57.1MB 280ms 10ms pypy 3.10.16
python 1.py 932ms 16ms 8.3MB 920ms 0ms pyston 3.8.12
python 2.py 1282ms 11ms 8.3MB 1270ms 0ms pyston 3.8.12
python 1.py 2968ms 4.6ms 8.8MB 2953ms 0ms cpython 3.13.2
python 2.py 3214ms 99ms 8.8MB 3200ms 0ms cpython 3.13.2

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 271ms 8.1ms 41.5MB 257ms 0ms nim 2.2.2
nim 1.nim 298ms 2.6ms 41.8MB 287ms 0ms nim/clang 2.2.2
python 1.py 2527ms 58ms 369.5MB 2457ms 57ms pypy 3.10.16
python 2.py 3022ms 8.2ms 633.0MB 2873ms 137ms pyston 3.8.12
python 1.py 4719ms 120ms 320.4MB 4657ms 50ms pyston 3.8.12
python 1.py timeout 0.0ms 321.1MB 4960ms 27ms cpython 3.13.2
python 2.py timeout 0.0ms 633.6MB 4843ms 143ms cpython 3.13.2
python 2.py timeout 0.0ms 959.8MB 4730ms 260ms pypy 3.10.16

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 51ms 0.5ms 11.5MB 40ms 0ms nim 2.2.2
nim 1.nim 57ms 0.8ms 11.8MB 50ms 0ms nim/clang 2.2.2
python 1.py 524ms 3.5ms 135.2MB 490ms 20ms pypy 3.10.16
python 2.py 734ms 1.6ms 164.2MB 697ms 27ms pyston 3.8.12
python 1.py 1045ms 7.6ms 86.0MB 1023ms 10ms pyston 3.8.12
python 2.py 1423ms 16ms 164.8MB 1380ms 30ms cpython 3.13.2
python 2.py 1530ms 19ms 290.2MB 1440ms 77ms pypy 3.10.16
python 1.py 2661ms 20ms 86.8MB 2640ms 10ms cpython 3.13.2

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1633ms 8.8ms 164.1MB 1603ms 13ms nim/clang 2.2.2
nim 1.nim 1703ms 20ms 163.9MB 1670ms 20ms nim 2.2.2
python 1.py 2244ms 5.8ms 243.6MB 2190ms 40ms pypy 3.10.16
python 1.py 4741ms 7.8ms 225.5MB 4550ms 173ms pyston 3.8.12
python 1.py timeout 0.0ms 146.4MB 4933ms 57ms cpython 3.13.2

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 173ms 2.3ms 20.9MB 160ms 0ms nim/clang 2.2.2
nim 1.nim 178ms 2.0ms 20.6MB 163ms 0ms nim 2.2.2
python 1.py 330ms 3.2ms 85.6MB 293ms 20ms pypy 3.10.16
python 1.py 497ms 6.0ms 29.8MB 463ms 17ms pyston 3.8.12
python 1.py 606ms 2.2ms 30.7MB 573ms 20ms cpython 3.13.2

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 3590ms 1.4ms 1.6MB 3580ms 0ms nim/clang 2.2.2
nim 1.nim 3596ms 7.0ms 1.9MB 3583ms 0ms nim 2.2.2
python 8.py timeout 0.0ms 14.9MB 40ms 10ms cpython 3.13.2
python 8.py timeout 0.0ms 95.4MB 790ms 77ms pypy 3.10.16
python 8.py timeout 0.0ms 14.2MB 37ms 13ms pyston 3.8.12

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 899ms 0.8ms 1.5MB 890ms 0ms nim/clang 2.2.2
nim 1.nim 901ms 1.6ms 1.3MB 890ms 0ms nim 2.2.2
python 8.py timeout 0.0ms 14.4MB 43ms 10ms cpython 3.13.2
python 8.py timeout 0.0ms 96.7MB 1313ms 177ms pypy 3.10.16
python 8.py timeout 0.0ms 13.7MB 53ms 20ms pyston 3.8.12

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 227ms 0.3ms 1.5MB 220ms 0ms nim/clang 2.2.2
nim 1.nim 229ms 1.2ms 1.3MB 220ms 0ms nim 2.2.2
python 8-m.py 1974ms 19ms 92.9MB 6383ms 260ms pypy 3.10.16
python 8.py timeout 0.0ms 14.0MB 90ms 20ms cpython 3.13.2
python 8.py timeout 0.0ms 13.1MB 123ms 37ms pyston 3.8.12