Programming Language and compiler
Benchmarks

C++ VS C 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

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

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 1.1ms 0.1ms 1.4MB 0ms 0ms zigcc 0.14.0
cpp 1.cpp 1.1ms 0.1ms 1.4MB 0ms 0ms g++ 11.4.0
c 1.c 1.3ms 0.1ms 2.1MB 0ms 0ms gcc 14.2.0
c 1.c 1.3ms 0.0ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
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
c 8-i.c 273ms 4.4ms 1.5MB 263ms 0ms zigcc 0.14.0
c 8-i.c 302ms 1.2ms 2.1MB 293ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 311ms 1.2ms 2.3MB 300ms 0ms gcc 14.2.0
c 5.c 314ms 1.5ms 2.3MB 300ms 0ms gcc 14.2.0
cpp 1.cpp 314ms 0.9ms 1.8MB 307ms 0ms g++ 11.4.0
c 2.c 315ms 1.9ms 1.5MB 310ms 0ms zigcc 0.14.0
c 5.c 316ms 0.5ms 2.1MB 307ms 0ms clang 14.0.0-1ubuntu1.1
cpp 1.cpp 316ms 1.6ms 2.3MB 310ms 0ms clang++ 14.0.0-1ubuntu1.1
c 5.c 316ms 1.1ms 1.5MB 310ms 0ms zigcc 0.14.0
c 2.c 318ms 2.1ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 332ms 0.8ms 2.3MB 323ms 0ms gcc 14.2.0

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
c 8-i.c 29ms 0.4ms 1.5MB 20ms 0ms zigcc 0.14.0
c 8-i.c 33ms 0.5ms 2.1MB 27ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 34ms 1.0ms 1.5MB 30ms 0ms zigcc 0.14.0
c 5.c 34ms 0.5ms 2.3MB 30ms 0ms gcc 14.2.0
c 2.c 34ms 1.0ms 2.3MB 27ms 0ms gcc 14.2.0
cpp 1.cpp 34ms 0.5ms 2.3MB 27ms 0ms clang++ 14.0.0-1ubuntu1.1
c 5.c 34ms 0.6ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 34ms 0.5ms 1.5MB 30ms 0ms zigcc 0.14.0
cpp 1.cpp 34ms 0.9ms 1.8MB 30ms 0ms g++ 11.4.0
c 8-i.c 36ms 0.1ms 2.3MB 30ms 0ms gcc 14.2.0
c 2.c 37ms 2.6ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 252ms 2.1ms 41.0MB 237ms 0ms gcc 14.2.0
c 1.c 268ms 1.9ms 40.2MB 250ms 0ms zigcc 0.14.0
c 1.c 269ms 5.7ms 40.9MB 250ms 3ms clang 14.0.0-1ubuntu1.1
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
c 1.c 49ms 1.1ms 11.6MB 40ms 0ms gcc 14.2.0
c 1.c 53ms 2.9ms 11.5MB 40ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 57ms 3.1ms 11.0MB 47ms 0ms zigcc 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
c 6-im.c 951ms 9.5ms 2.0MB 3740ms 0ms gcc 14.2.0
c 4-m.c 968ms 1.5ms 2.0MB 3803ms 0ms gcc 14.2.0
c 6-im.c 1003ms 0.8ms 3.3MB 3940ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1089ms 3.6ms 2.0MB 4287ms 3ms gcc 14.2.0
c 4-m.c 1129ms 14ms 3.3MB 4427ms 7ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1335ms 7.2ms 3.3MB 5240ms 7ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1849ms 16ms 3.4MB 7250ms 20ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1980ms 13ms 2.0MB 7780ms 3ms gcc 14.2.0

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
c 6-im.c 248ms 5.1ms 2.0MB 953ms 0ms gcc 14.2.0
c 4-m.c 253ms 1.6ms 2.0MB 967ms 0ms gcc 14.2.0
c 6-im.c 259ms 1.4ms 3.3MB 990ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 290ms 15ms 2.0MB 1103ms 0ms gcc 14.2.0
c 4-m.c 294ms 9.2ms 3.3MB 1117ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 351ms 17ms 3.4MB 1333ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 468ms 7.2ms 3.3MB 1807ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 496ms 2.9ms 2.0MB 1933ms 0ms gcc 14.2.0

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
c 4-m.c 71ms 0.5ms 2.1MB 257ms 0ms gcc 14.2.0
c 6-im.c 73ms 2.6ms 3.3MB 250ms 0ms clang 14.0.0-1ubuntu1.1
c 6-im.c 73ms 6.2ms 2.0MB 257ms 0ms gcc 14.2.0
c 4-m.c 78ms 0.7ms 3.1MB 280ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 80ms 0.7ms 2.0MB 287ms 0ms gcc 14.2.0
c 5-im.c 93ms 0.7ms 3.3MB 330ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 124ms 1.1ms 3.1MB 453ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 131ms 0.9ms 2.0MB 490ms 0ms gcc 14.2.0