Programming Language and compiler
Benchmarks

C++ VS Zig 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.)

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 395ms 1.4ms 2.6MB 1530ms 0ms g++ 11.4.0
cpp 1-im.cpp 401ms 9.4ms 3.9MB 1550ms 0ms clang++ 14.0.0-1ubuntu1.1
zig 2-m.zig 634ms 1.8ms 1.4MB 2393ms 0ms zig 0.14.0
zig 3-i.zig 1767ms 0.8ms 1.0MB 1760ms 0ms zig 0.14.0
zig 1.zig 2716ms 0.8ms 1.0MB 2710ms 0ms zig 0.14.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 41ms 1.0ms 3.9MB 130ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 43ms 4.4ms 2.4MB 137ms 0ms g++ 11.4.0
zig 2-m.zig 60ms 0.8ms 1.4MB 200ms 0ms zig 0.14.0
zig 3-i.zig 147ms 0.6ms 1.0MB 140ms 0ms zig 0.14.0
zig 1.zig 229ms 0.5ms 1.0MB 220ms 0ms zig 0.14.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 1.0ms 0.0ms 1.0MB 0ms 0ms zig 0.14.0
cpp 1.cpp 1.1ms 0.1ms 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

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 0.4ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
zig 3.zig 199ms 0.7ms 1.0MB 190ms 0ms zig 0.14.0
zig 2.zig 279ms 0.3ms 1.0MB 270ms 0ms zig 0.14.0
cpp 1.cpp 314ms 0.9ms 1.8MB 307ms 0ms g++ 11.4.0
zig 1.zig 316ms 1.3ms 1.1MB 303ms 0ms zig 0.14.0
cpp 1.cpp 316ms 1.6ms 2.3MB 310ms 0ms clang++ 14.0.0-1ubuntu1.1

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 0.0ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
zig 3.zig 22ms 0.3ms 1.0MB 10ms 0ms zig 0.14.0
zig 2.zig 30ms 0.2ms 1.0MB 20ms 0ms zig 0.14.0
zig 1.zig 34ms 0.4ms 1.1MB 30ms 0ms zig 0.14.0
cpp 1.cpp 34ms 0.5ms 2.3MB 27ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.9ms 1.8MB 30ms 0ms g++ 11.4.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 263ms 1.5ms 40.1MB 250ms 0ms zig 0.14.0
zig 2.zig 322ms 3.8ms 6.0MB 313ms 0ms zig 0.14.0
cpp 1.cpp 481ms 2.1ms 7.3MB 470ms 0ms g++ 11.4.0
cpp 1.cpp 527ms 0.7ms 7.7MB 517ms 0ms clang++ 14.0.0-1ubuntu1.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 52ms 1.4ms 10.8MB 40ms 0ms zig 0.14.0
zig 2.zig 81ms 1.3ms 2.3MB 70ms 0ms zig 0.14.0
cpp 1.cpp 119ms 0.6ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 131ms 0.7ms 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 0.5ms 3.5MB 1817ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 492ms 15ms 2.1MB 1897ms 0ms g++ 11.4.0
cpp 6-im.cpp 921ms 2.1ms 3.4MB 3610ms 3ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 922ms 0.6ms 2.1MB 3630ms 0ms g++ 11.4.0
zig 1.zig 3705ms 29ms 1.4MB 3693ms 0ms zig 0.14.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 125ms 0.9ms 3.4MB 453ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 129ms 1.9ms 2.0MB 483ms 0ms g++ 11.4.0
cpp 6-im.cpp 240ms 2.2ms 2.0MB 923ms 0ms g++ 11.4.0
cpp 6-im.cpp 244ms 7.1ms 3.4MB 920ms 0ms clang++ 14.0.0-1ubuntu1.1
zig 1.zig 922ms 1.2ms 1.3MB 910ms 0ms zig 0.14.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 40ms 0.9ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 5.0ms 3.4MB 117ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 66ms 0.6ms 3.4MB 227ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 68ms 1.1ms 2.0MB 243ms 0ms g++ 11.4.0
zig 1.zig 234ms 0.8ms 1.3MB 223ms 0ms zig 0.14.0