Programming Language and compiler
Benchmarks

C++ VS Ruby benchmarks

Current benchmark data was generated on Fri Aug 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 401ms 5.2ms 3.9MB 1553ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 402ms 3.8ms 2.6MB 1547ms 0ms g++ 11.4.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 39ms 1.2ms 2.5MB 127ms 0ms g++ 11.4.0
cpp 1-im.cpp 40ms 1.1ms 3.9MB 133ms 0ms clang++ 14.0.0-1ubuntu1.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.0ms 0.1ms 1.4MB 0ms 0ms g++ 11.4.0
cpp 1.cpp 1.3ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
ruby 1.rb 35ms 0.6ms 141.9MB 12ms 28ms truffleruby 24.2.2
ruby 1.rb 50ms 0.8ms 12.8MB 36ms 4ms ruby 3.4.5
ruby 1.rb 51ms 1.7ms 13.0MB 36ms 4ms ruby/yjit 3.4.5

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 167ms 0.3ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.3ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 315ms 1.4ms 2.3MB 307ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 316ms 0.7ms 1.9MB 307ms 0ms g++ 11.4.0
ruby 2.rb 817ms 1.5ms 309.6MB 1057ms 110ms truffleruby 24.2.2
ruby 2.rb timeout 0.0ms 12.8MB 4983ms 7ms ruby 3.4.5
ruby 2.rb timeout 0.0ms 13.5MB 4980ms 0ms ruby/yjit 3.4.5

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 18ms 0.1ms 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 33ms 0.1ms 1.8MB 23ms 0ms g++ 11.4.0
cpp 1.cpp 33ms 0.1ms 2.3MB 30ms 0ms clang++ 14.0.0-1ubuntu1.1
ruby 2-m.rb 309ms 13ms 309.8MB 537ms 117ms truffleruby 24.2.2
ruby 2.rb 1044ms 2.3ms 13.5MB 1023ms 7ms ruby/yjit 3.4.5
ruby 2.rb 2832ms 56ms 12.8MB 2813ms 7ms ruby 3.4.5

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 485ms 0.9ms 7.3MB 470ms 0ms g++ 11.4.0
cpp 1.cpp 531ms 2.8ms 7.8MB 520ms 0ms clang++ 14.0.0-1ubuntu1.1
ruby 1.rb timeout 0.0ms 325.3MB 4840ms 140ms ruby 3.4.5
ruby 1.rb timeout 0.0ms 327.0MB 4847ms 140ms ruby/yjit 3.4.5
ruby 1.rb timeout 0.0ms 737.6MB 5057ms 157ms truffleruby 24.2.2

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 121ms 1.9ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 131ms 1.3ms 4.1MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
ruby 1-m.rb 1694ms 36ms 474.9MB 2407ms 170ms truffleruby 24.2.2
ruby 1.rb 3393ms 45ms 131.6MB 3303ms 70ms ruby/yjit 3.4.5
ruby 1.rb 4458ms 22ms 131.0MB 4367ms 77ms ruby 3.4.5

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 469ms 3.9ms 3.4MB 1827ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 482ms 1.0ms 2.4MB 1887ms 0ms g++ 11.4.0
cpp 6-im.cpp 926ms 10ms 2.3MB 3637ms 0ms g++ 11.4.0
cpp 6-im.cpp 935ms 18ms 3.4MB 3647ms 0ms clang++ 14.0.0-1ubuntu1.1
ruby 4.rb timeout 0.0ms 12.9MB 4987ms 0ms ruby 3.4.5
ruby 4.rb timeout 0.0ms 13.5MB 4980ms 10ms ruby/yjit 3.4.5
ruby 4.rb timeout 0.0ms 420.8MB 5170ms 227ms truffleruby 24.2.2

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 123ms 0.7ms 3.4MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 0.6ms 2.0MB 483ms 0ms g++ 11.4.0
cpp 6-im.cpp 237ms 1.4ms 3.4MB 903ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 239ms 2.4ms 2.0MB 913ms 0ms g++ 11.4.0
ruby 4.rb 4810ms 20ms 422.1MB 5107ms 190ms truffleruby 24.2.2
ruby 4.rb timeout 0.0ms 12.9MB 4983ms 0ms ruby 3.4.5
ruby 4.rb timeout 0.0ms 13.6MB 4983ms 0ms ruby/yjit 3.4.5

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 37ms 1.4ms 3.4MB 110ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 39ms 0.4ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 6-im.cpp 64ms 0.1ms 3.4MB 227ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 66ms 0.6ms 2.1MB 237ms 0ms g++ 11.4.0
ruby 4.rb 1419ms 19ms 379.8MB 1753ms 130ms truffleruby 24.2.2
ruby 4.rb timeout 0.0ms 12.9MB 4987ms 0ms ruby 3.4.5
ruby 4.rb timeout 0.0ms 13.8MB 4983ms 0ms ruby/yjit 3.4.5