Programming Language and compiler
Benchmarks

C++ VS Java benchmarks

Current benchmark data was generated on Mon May 19 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 4.9ms 2.6MB 1543ms 0ms g++ 11.4.0
cpp 1-im.cpp 402ms 3.2ms 3.9MB 1557ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1-m.java 898ms 11ms 96.1MB 3307ms 40ms graal/jvm 17.0.8
java 1-m.java 988ms 11ms 48.3MB 3657ms 23ms openjdk 21
java 1-m.java 990ms 2.9ms 50.2MB 3640ms 27ms openjdk 23
java 1-m.java 1042ms 3.9ms 45.7MB 3403ms 137ms openjdk/zgc 21

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 41ms 1.6ms 2.5MB 133ms 0ms g++ 11.4.0
cpp 1-im.cpp 42ms 1.5ms 3.9MB 137ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1-m.java 180ms 7.7ms 48.6MB 490ms 20ms openjdk 21
java 1-m.java 198ms 0.9ms 50.3MB 520ms 23ms openjdk 23
java 1-m.java 210ms 5.5ms 95.7MB 587ms 40ms graal/jvm 17.0.8
java 1-m.java 311ms 8.8ms 45.9MB 520ms 140ms 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 1.3ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 65ms 2.3ms 53.1MB 68ms 20ms graal/jvm 17.0.8
java 1.java 70ms 6.5ms 44.7MB 80ms 14ms openjdk 23
java 1.java 70ms 4.4ms 43.9MB 76ms 18ms openjdk 21
java 1.java 194ms 7.5ms 43.0MB 86ms 142ms 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 0.5ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.2ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 313ms 0.2ms 1.8MB 303ms 0ms g++ 11.4.0
cpp 1.cpp 331ms 25ms 2.3MB 323ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 445ms 0.4ms 45.0MB 490ms 13ms openjdk 21
java 1.java 446ms 3.8ms 48.4MB 477ms 20ms openjdk 23
java 1.java 447ms 2.3ms 82.2MB 477ms 27ms graal/jvm 17.0.8
java 1.java 577ms 2.1ms 44.8MB 497ms 140ms openjdk/zgc 21
java 2.java 1252ms 5.6ms 639.9MB 1390ms 87ms openjdk 21
java 2.java 1277ms 19ms 794.0MB 1390ms 113ms openjdk 23
java 2.java 3274ms 53ms 2445.6MB 1653ms 1830ms openjdk/zgc 21

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 0.2ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.4ms 1.8MB 30ms 0ms g++ 11.4.0
cpp 1.cpp 34ms 0.3ms 2.3MB 30ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 120ms 4.0ms 48.0MB 153ms 20ms openjdk 23
java 1.java 122ms 2.1ms 44.9MB 167ms 13ms openjdk 21
java 1-m.java 123ms 4.2ms 81.5MB 157ms 33ms graal/jvm 17.0.8
java 1.java 249ms 3.8ms 44.9MB 157ms 147ms openjdk/zgc 21
java 2-m.java 302ms 22ms 344.8MB 437ms 53ms openjdk 21
java 2-m.java 313ms 7.2ms 400.0MB 443ms 70ms openjdk 23
java 2.java 684ms 17ms 532.7MB 467ms 407ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 410ms 3.5ms 115.8MB 463ms 27ms openjdk 21
java 1.java 424ms 3.9ms 118.5MB 467ms 27ms openjdk 23
cpp 1.cpp 494ms 10ms 7.3MB 483ms 0ms g++ 11.4.0
cpp 1.cpp 529ms 1.4ms 7.7MB 520ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 587ms 6.0ms 112.8MB 493ms 163ms openjdk/zgc 21
java 1-m.java 644ms 25ms 236.7MB 933ms 77ms graal/jvm 17.0.8
java 2.java 782ms 3.1ms 56.9MB 837ms 17ms openjdk 21
java 2.java 786ms 9.6ms 60.5MB 840ms 20ms openjdk 23
java 2.java 847ms 3.9ms 53.2MB 777ms 143ms openjdk/zgc 21
java 2-m.java 1339ms 8.3ms 234.5MB 2410ms 100ms graal/jvm 17.0.8

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 121ms 1.4ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 132ms 0.8ms 4.1MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 155ms 2.3ms 68.1MB 200ms 23ms openjdk 23
java 1.java 158ms 3.5ms 64.7MB 210ms 20ms openjdk 21
java 1-m.java 210ms 6.9ms 124.8MB 297ms 47ms graal/jvm 17.0.8
java 2.java 262ms 3.1ms 50.5MB 310ms 23ms openjdk 23
java 2.java 263ms 1.2ms 50.0MB 327ms 20ms openjdk 21
java 1.java 286ms 4.1ms 61.5MB 203ms 150ms openjdk/zgc 21
java 2.java 370ms 2.8ms 47.7MB 303ms 147ms openjdk/zgc 21
java 2-m.java 470ms 6.2ms 199.2MB 830ms 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 470ms 2.9ms 3.4MB 1823ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 483ms 0.4ms 2.1MB 1880ms 0ms g++ 11.4.0
cpp 6-im.cpp 925ms 8.4ms 2.3MB 3630ms 0ms g++ 11.4.0
cpp 6-im.cpp 926ms 13ms 3.4MB 3623ms 0ms clang++ 14.0.0-1ubuntu1.1
java 2-m.java 1987ms 7.3ms 47.4MB 7587ms 27ms openjdk 21
java 2-m.java 2001ms 11ms 48.8MB 7653ms 27ms openjdk 23
java 2-m.java 2120ms 12ms 45.2MB 7633ms 150ms openjdk/zgc 21
java 2-m.java 2521ms 48ms 94.9MB 9407ms 50ms 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 0.4ms 3.4MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 1.3ms 2.0MB 477ms 0ms g++ 11.4.0
cpp 6-im.cpp 238ms 1.4ms 3.4MB 907ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 253ms 24ms 2.0MB 953ms 0ms g++ 11.4.0
java 2-m.java 605ms 4.2ms 47.7MB 2140ms 20ms openjdk 21
java 2-m.java 617ms 2.8ms 48.8MB 2187ms 20ms openjdk 23
java 2-m.java 732ms 8.1ms 45.3MB 2153ms 147ms openjdk/zgc 21
java 2-m.java 776ms 4.7ms 95.1MB 2737ms 43ms 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 40ms 0.5ms 2.0MB 133ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 7.1ms 3.5MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 65ms 0.5ms 3.5MB 223ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 68ms 1.0ms 2.0MB 243ms 0ms g++ 11.4.0
java 2-m.java 248ms 5.2ms 47.7MB 723ms 20ms openjdk 21
java 2-m.java 267ms 4.0ms 48.4MB 787ms 20ms openjdk 23
java 2-m.java 323ms 9.1ms 94.0MB 987ms 43ms graal/jvm 17.0.8
java 2-m.java 387ms 8.0ms 45.5MB 783ms 147ms openjdk/zgc 21