Programming Language and compiler
Benchmarks

C++ VS Ruby 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.)

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 402ms 3.9ms 4.0MB 1563ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 403ms 1.7ms 2.5MB 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 40ms 1.4ms 2.6MB 130ms 0ms g++ 11.4.0
cpp 1-im.cpp 40ms 1.4ms 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 0.0ms 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 34ms 0.4ms 141.1MB 12ms 24ms truffleruby 24.2.1
ruby 1.rb 51ms 1.1ms 12.8MB 38ms 0ms ruby 3.4.4
ruby 1.rb 53ms 0.4ms 12.9MB 38ms 4ms ruby/yjit 3.4.4

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 0.8ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 314ms 1.3ms 1.8MB 307ms 0ms g++ 11.4.0
cpp 1.cpp 316ms 1.0ms 2.3MB 310ms 0ms clang++ 14.0.0-1ubuntu1.1
ruby 2.rb 836ms 14ms 325.0MB 1103ms 117ms truffleruby 24.2.1
ruby 2.rb timeout 0.0ms 12.8MB 4983ms 3ms ruby 3.4.4
ruby 2.rb timeout 0.0ms 13.5MB 4977ms 10ms ruby/yjit 3.4.4

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 0.4ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.6ms 2.3MB 30ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.9ms 1.8MB 30ms 0ms g++ 11.4.0
ruby 2-m.rb 309ms 6.6ms 309.6MB 560ms 103ms truffleruby 24.2.1
ruby 2.rb 1028ms 6.1ms 13.5MB 1010ms 3ms ruby/yjit 3.4.4
ruby 2.rb 2980ms 14ms 12.8MB 2963ms 7ms ruby 3.4.4

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 484ms 1.6ms 7.3MB 477ms 0ms g++ 11.4.0
cpp 1.cpp 528ms 2.2ms 7.7MB 520ms 0ms clang++ 14.0.0-1ubuntu1.1
ruby 1.rb timeout 0.0ms 325.3MB 4850ms 133ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 327.0MB 4847ms 140ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 731.6MB 5070ms 153ms truffleruby 24.2.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 119ms 1.7ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 133ms 0.8ms 4.0MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
ruby 1-m.rb 1697ms 10ms 473.8MB 2493ms 170ms truffleruby 24.2.1
ruby 1.rb 3416ms 80ms 131.8MB 3323ms 83ms ruby/yjit 3.4.4
ruby 1.rb 4472ms 16ms 131.0MB 4383ms 73ms ruby 3.4.4

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 468ms 1.6ms 3.4MB 1820ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 482ms 0.8ms 2.1MB 1880ms 0ms g++ 11.4.0
cpp 6-im.cpp 921ms 2.0ms 2.3MB 3627ms 0ms g++ 11.4.0
cpp 6-im.cpp 924ms 12ms 3.4MB 3610ms 3ms clang++ 14.0.0-1ubuntu1.1
ruby 4.rb timeout 0.0ms 12.9MB 4983ms 7ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.5MB 4980ms 0ms ruby/yjit 3.4.4
ruby 4.rb timeout 0.0ms 436.6MB 5167ms 240ms truffleruby 24.2.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 123ms 0.9ms 3.6MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 0.7ms 2.0MB 480ms 0ms g++ 11.4.0
cpp 6-im.cpp 238ms 0.5ms 2.1MB 913ms 0ms g++ 11.4.0
cpp 6-im.cpp 241ms 5.7ms 3.4MB 910ms 0ms clang++ 14.0.0-1ubuntu1.1
ruby 4.rb 4848ms 12ms 433.6MB 5140ms 203ms truffleruby 24.2.1
ruby 4.rb timeout 0.0ms 12.8MB 4980ms 0ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.5MB 4983ms 3ms ruby/yjit 3.4.4

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 39ms 0.4ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 39ms 4.7ms 3.4MB 113ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 64ms 0.4ms 3.4MB 227ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 67ms 0.1ms 2.0MB 240ms 0ms g++ 11.4.0
ruby 4.rb 1458ms 6.2ms 377.4MB 1793ms 157ms truffleruby 24.2.1
ruby 4.rb timeout 0.0ms 12.9MB 4980ms 3ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.6MB 4980ms 3ms ruby/yjit 3.4.4