Programming Language and compiler
Benchmarks

All C benchmarks

Current benchmark data was generated on Sun Jul 13 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.)

helloworld

Input: QwQ

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
1.c 1.0ms 0.0ms 1.3MB 0ms 0ms zigcc 0.14.1
1.c 1.2ms 0.1ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
1.c 1.2ms 0.0ms 2.1MB 0ms 0ms gcc 15.1.0

knucleotide

Input: 2500000_in

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
1-m.c 172ms 4.3ms 23.6MB 400ms 10ms gcc 15.1.0
1-m.c 295ms 5.0ms 25.7MB 1007ms 33ms clang 14.0.0-1ubuntu1.1

Input: 250000_in

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
1-m.c 28ms 0.6ms 12.6MB 57ms 0ms gcc 15.1.0
1-m.c 37ms 1.7ms 15.0MB 107ms 0ms clang 14.0.0-1ubuntu1.1

mandelbrot

Input: 5000

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
1-mffi.c 223ms 10ms 7.6MB 830ms 13ms clang 14.0.0-1ubuntu1.1
1-mffi.c 266ms 5.3ms 6.5MB 813ms 0ms gcc 15.1.0
1-ffi.c 330ms 1.2ms 6.0MB 320ms 0ms zigcc 0.14.1
1-mffi.c 331ms 2.9ms 6.0MB 320ms 0ms zigcc 0.14.1
1-ffi.c 453ms 1.4ms 6.7MB 443ms 0ms clang 14.0.0-1ubuntu1.1
1-ffi.c 544ms 3.5ms 6.6MB 533ms 0ms gcc 15.1.0

Input: 1000

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
1-mffi.c 16ms 0.5ms 4.5MB 30ms 0ms clang 14.0.0-1ubuntu1.1
1-ffi.c 16ms 0.1ms 3.0MB 10ms 0ms zigcc 0.14.1
1-mffi.c 16ms 0.4ms 3.0MB 10ms 0ms zigcc 0.14.1
1-mffi.c 19ms 2.4ms 3.6MB 47ms 0ms gcc 15.1.0
1-ffi.c 22ms 0.6ms 3.5MB 10ms 0ms clang 14.0.0-1ubuntu1.1
1-ffi.c 26ms 0.6ms 3.8MB 20ms 0ms gcc 15.1.0

nbody

Input: 5000000

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
8-i.c 267ms 0.8ms 1.5MB 260ms 0ms zigcc 0.14.1
8-i.c 301ms 1.4ms 2.1MB 290ms 0ms clang 14.0.0-1ubuntu1.1
2.c 309ms 1.5ms 2.3MB 300ms 0ms gcc 15.1.0
5.c 313ms 1.4ms 2.3MB 303ms 0ms gcc 15.1.0
2.c 313ms 1.7ms 1.5MB 307ms 0ms zigcc 0.14.1
5.c 316ms 0.6ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
5.c 316ms 2.1ms 1.5MB 310ms 0ms zigcc 0.14.1
2.c 319ms 2.0ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
8-i.c 336ms 1.3ms 2.3MB 330ms 0ms gcc 15.1.0

Input: 500000

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
8-i.c 29ms 0.3ms 1.5MB 20ms 0ms zigcc 0.14.1
8-i.c 32ms 0.5ms 2.1MB 20ms 0ms clang 14.0.0-1ubuntu1.1
2.c 33ms 0.4ms 1.5MB 30ms 0ms zigcc 0.14.1
5.c 33ms 0.6ms 2.3MB 30ms 0ms gcc 15.1.0
2.c 34ms 0.7ms 2.3MB 30ms 0ms gcc 15.1.0
5.c 34ms 0.4ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
5.c 35ms 0.6ms 1.5MB 30ms 0ms zigcc 0.14.1
8-i.c 36ms 0.5ms 2.3MB 30ms 0ms gcc 15.1.0
2.c 36ms 3.1ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1

nsieve

Input: 12

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
1.c 267ms 3.7ms 41.0MB 253ms 0ms clang 14.0.0-1ubuntu1.1
1.c 277ms 11ms 40.9MB 257ms 0ms gcc 15.1.0
1.c 282ms 4.5ms 40.3MB 267ms 0ms zigcc 0.14.1

Input: 10

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
1.c 56ms 2.7ms 11.8MB 43ms 0ms gcc 15.1.0
1.c 59ms 2.7ms 11.7MB 47ms 0ms clang 14.0.0-1ubuntu1.1
1.c 64ms 1.3ms 11.0MB 50ms 0ms zigcc 0.14.1

spectral-norm

Input: 8000

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
3-m.c 735ms 1.2ms 2.0MB 2887ms 0ms gcc 15.1.0
6-im.c 969ms 27ms 2.0MB 3773ms 0ms gcc 15.1.0
4-m.c 996ms 15ms 2.0MB 3907ms 0ms gcc 15.1.0
6-im.c 1002ms 1.1ms 3.1MB 3943ms 0ms clang 14.0.0-1ubuntu1.1
4-m.c 1119ms 3.6ms 3.4MB 4407ms 0ms clang 14.0.0-1ubuntu1.1
5-im.c 1141ms 0.4ms 2.0MB 4510ms 0ms gcc 15.1.0
5-im.c 1326ms 1.0ms 3.1MB 5233ms 0ms clang 14.0.0-1ubuntu1.1
3-m.c 1841ms 29ms 3.3MB 7233ms 7ms clang 14.0.0-1ubuntu1.1

Input: 4000

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
3-m.c 194ms 0.5ms 2.0MB 740ms 0ms gcc 15.1.0
6-im.c 245ms 0.6ms 2.0MB 947ms 0ms gcc 15.1.0
4-m.c 258ms 0.9ms 2.1MB 990ms 0ms gcc 15.1.0
6-im.c 260ms 1.0ms 3.3MB 990ms 0ms clang 14.0.0-1ubuntu1.1
4-m.c 287ms 0.9ms 3.3MB 1103ms 0ms clang 14.0.0-1ubuntu1.1
5-im.c 298ms 7.7ms 2.0MB 1147ms 0ms gcc 15.1.0
5-im.c 341ms 2.4ms 3.3MB 1313ms 0ms clang 14.0.0-1ubuntu1.1
3-m.c 468ms 9.9ms 3.3MB 1807ms 0ms clang 14.0.0-1ubuntu1.1

Input: 2000

code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
3-m.c 55ms 1.3ms 2.3MB 197ms 0ms gcc 15.1.0
4-m.c 72ms 0.1ms 2.0MB 260ms 0ms gcc 15.1.0
6-im.c 73ms 8.3ms 2.0MB 250ms 0ms gcc 15.1.0
6-im.c 75ms 7.4ms 3.3MB 257ms 0ms clang 14.0.0-1ubuntu1.1
4-m.c 78ms 0.6ms 3.3MB 280ms 0ms clang 14.0.0-1ubuntu1.1
5-im.c 81ms 1.3ms 2.0MB 293ms 0ms gcc 15.1.0
5-im.c 95ms 6.8ms 3.1MB 340ms 0ms clang 14.0.0-1ubuntu1.1
3-m.c 124ms 3.1ms 3.3MB 450ms 0ms clang 14.0.0-1ubuntu1.1