Programming Language and compiler
Benchmarks

C++ VS Java benchmarks

Current benchmark data was generated on Thu May 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 397ms 5.7ms 2.6MB 1537ms 0ms g++ 11.4.0
cpp 1-im.cpp 406ms 9.6ms 3.9MB 1573ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1-m.java 899ms 16ms 96.0MB 3297ms 37ms graal/jvm 17.0.8
java 1-m.java 969ms 1.2ms 48.2MB 3613ms 23ms openjdk 21
java 1-m.java 975ms 13ms 50.4MB 3590ms 27ms openjdk 23
java 1-m.java 1033ms 1.0ms 45.9MB 3390ms 147ms openjdk/zgc 21

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 41ms 2.8ms 4.0MB 133ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 41ms 4.6ms 2.6MB 137ms 0ms g++ 11.4.0
java 1-m.java 183ms 11ms 48.2MB 500ms 23ms openjdk 21
java 1-m.java 189ms 2.6ms 50.2MB 493ms 20ms openjdk 23
java 1-m.java 195ms 2.6ms 95.8MB 540ms 33ms graal/jvm 17.0.8
java 1-m.java 307ms 6.5ms 45.9MB 517ms 137ms openjdk/zgc 21

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 1.5ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 62ms 1.3ms 52.7MB 66ms 18ms graal/jvm 17.0.8
java 1.java 71ms 1.1ms 43.7MB 74ms 12ms openjdk 21
java 1.java 72ms 2.0ms 44.7MB 76ms 14ms openjdk 23
java 1.java 189ms 5.2ms 42.9MB 80ms 136ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 167ms 0.2ms 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 314ms 0.8ms 2.3MB 307ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 315ms 2.0ms 1.8MB 303ms 0ms g++ 11.4.0
java 1.java 440ms 3.0ms 45.1MB 477ms 20ms openjdk 21
java 1.java 444ms 1.1ms 48.2MB 480ms 20ms openjdk 23
java 1.java 447ms 4.2ms 81.5MB 483ms 27ms graal/jvm 17.0.8
java 1.java 570ms 5.4ms 44.7MB 497ms 133ms openjdk/zgc 21
java 2.java 1230ms 3.1ms 579.3MB 1353ms 83ms openjdk 21
java 2.java 1248ms 1.3ms 759.3MB 1357ms 110ms openjdk 23
java 2.java 3219ms 18ms 2343.5MB 1627ms 1803ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 18ms 0.0ms 1.5MB 10ms 0ms g++ 11.4.0
cpp 0-i.cpp 19ms 0.2ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.3ms 2.3MB 27ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.9ms 1.9MB 30ms 0ms g++ 11.4.0
java 1.java 119ms 2.0ms 45.2MB 157ms 20ms openjdk 21
java 1.java 120ms 1.7ms 48.4MB 157ms 20ms openjdk 23
java 1.java 125ms 4.1ms 81.6MB 153ms 33ms graal/jvm 17.0.8
java 1.java 243ms 3.0ms 44.8MB 167ms 140ms openjdk/zgc 21
java 2-m.java 286ms 3.4ms 356.7MB 417ms 53ms openjdk 21
java 2-m.java 310ms 7.8ms 413.9MB 440ms 70ms openjdk 23
java 2.java 684ms 9.8ms 530.4MB 453ms 420ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 402ms 2.3ms 118.6MB 447ms 23ms openjdk 23
java 1.java 410ms 1.4ms 114.9MB 463ms 20ms openjdk 21
cpp 1.cpp 487ms 2.7ms 7.3MB 480ms 0ms g++ 11.4.0
cpp 1.cpp 531ms 3.0ms 7.8MB 520ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 580ms 9.2ms 112.8MB 480ms 170ms openjdk/zgc 21
java 1-m.java 624ms 34ms 271.5MB 903ms 70ms graal/jvm 17.0.8
java 2.java 781ms 2.9ms 57.3MB 840ms 17ms openjdk 21
java 2.java 782ms 2.8ms 60.3MB 833ms 23ms openjdk 23
java 2.java 841ms 5.2ms 53.3MB 770ms 140ms openjdk/zgc 21
java 2-m.java 1350ms 36ms 197.1MB 2433ms 97ms graal/jvm 17.0.8

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 120ms 1.9ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 131ms 2.1ms 4.1MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 154ms 0.3ms 68.1MB 200ms 20ms openjdk 23
java 1.java 162ms 5.3ms 65.0MB 217ms 20ms openjdk 21
java 1-m.java 205ms 14ms 137.8MB 287ms 43ms graal/jvm 17.0.8
java 2.java 259ms 1.4ms 50.0MB 323ms 17ms openjdk 21
java 2.java 262ms 7.0ms 50.4MB 310ms 17ms openjdk 23
java 1.java 287ms 3.4ms 61.6MB 210ms 147ms openjdk/zgc 21
java 2.java 370ms 1.9ms 47.3MB 310ms 143ms openjdk/zgc 21
java 2-m.java 472ms 2.1ms 145.4MB 833ms 63ms graal/jvm 17.0.8

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 469ms 2.7ms 3.4MB 1823ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 504ms 36ms 2.1MB 1933ms 0ms g++ 11.4.0
cpp 6-im.cpp 919ms 0.8ms 3.4MB 3610ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 921ms 0.4ms 2.3MB 3627ms 0ms g++ 11.4.0
java 2-m.java 1991ms 5.9ms 47.8MB 7610ms 23ms openjdk 21
java 2-m.java 1993ms 9.7ms 48.4MB 7613ms 30ms openjdk 23
java 2-m.java 2124ms 14ms 45.4MB 7600ms 157ms openjdk/zgc 21
java 2-m.java 2505ms 22ms 93.6MB 9400ms 40ms graal/jvm 17.0.8

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 124ms 1.3ms 3.4MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 0.2ms 2.0MB 480ms 0ms g++ 11.4.0
cpp 6-im.cpp 238ms 1.7ms 3.4MB 907ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 240ms 4.3ms 2.1MB 917ms 0ms g++ 11.4.0
java 2-m.java 600ms 7.0ms 47.8MB 2137ms 20ms openjdk 21
java 2-m.java 609ms 4.3ms 48.7MB 2157ms 23ms openjdk 23
java 2-m.java 729ms 2.4ms 45.4MB 2157ms 140ms openjdk/zgc 21
java 2-m.java 768ms 0.7ms 93.5MB 2703ms 37ms graal/jvm 17.0.8

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 39ms 0.1ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 40ms 8.1ms 3.5MB 117ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 67ms 0.1ms 2.1MB 240ms 0ms g++ 11.4.0
cpp 6-im.cpp 68ms 4.7ms 3.3MB 230ms 0ms clang++ 14.0.0-1ubuntu1.1
java 2-m.java 251ms 5.6ms 47.5MB 753ms 17ms openjdk 21
java 2-m.java 258ms 5.3ms 48.9MB 763ms 20ms openjdk 23
java 2-m.java 311ms 24ms 94.6MB 957ms 37ms graal/jvm 17.0.8
java 2-m.java 372ms 10ms 45.2MB 733ms 140ms openjdk/zgc 21