Programming Language and compiler
Benchmarks

C++ VS Java benchmarks

Current benchmark data was generated on Sun Jun 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 396ms 4.5ms 2.5MB 1533ms 0ms g++ 11.4.0
cpp 1-im.cpp 402ms 5.0ms 4.0MB 1557ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1-m.java 896ms 2.1ms 96.4MB 3313ms 40ms graal/jvm 17.0.8
java 1-m.java 966ms 3.7ms 48.3MB 3607ms 17ms openjdk 21
java 1-m.java 983ms 2.3ms 50.2MB 3620ms 20ms openjdk 23
java 1-m.java 1025ms 15ms 45.9MB 3360ms 137ms openjdk/zgc 21

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 40ms 0.6ms 4.0MB 130ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 40ms 2.9ms 2.5MB 133ms 0ms g++ 11.4.0
java 1-m.java 180ms 11ms 48.1MB 493ms 23ms openjdk 21
java 1-m.java 188ms 3.4ms 50.1MB 490ms 23ms openjdk 23
java 1-m.java 201ms 17ms 96.2MB 570ms 33ms graal/jvm 17.0.8
java 1-m.java 295ms 8.2ms 45.8MB 487ms 133ms 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 1.4ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 62ms 2.4ms 52.7MB 68ms 18ms graal/jvm 17.0.8
java 1.java 69ms 6.7ms 43.8MB 78ms 12ms openjdk 21
java 1.java 73ms 1.7ms 44.5MB 74ms 16ms openjdk 23
java 1.java 184ms 2.0ms 42.9MB 80ms 132ms 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 0.4ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.7ms 2.4MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 314ms 2.2ms 1.8MB 303ms 0ms g++ 11.4.0
cpp 1.cpp 318ms 0.4ms 2.3MB 310ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 441ms 1.8ms 45.4MB 480ms 13ms openjdk 21
java 1.java 444ms 1.2ms 48.2MB 480ms 20ms openjdk 23
java 1.java 447ms 3.2ms 81.7MB 483ms 23ms graal/jvm 17.0.8
java 1.java 567ms 1.6ms 45.0MB 490ms 140ms openjdk/zgc 21
java 2.java 1230ms 1.5ms 567.4MB 1367ms 73ms openjdk 21
java 2.java 1245ms 7.7ms 792.1MB 1367ms 93ms openjdk 23
java 2.java 3242ms 30ms 2411.5MB 1663ms 1800ms 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 0.1ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.4ms 1.9MB 30ms 0ms g++ 11.4.0
cpp 1.cpp 34ms 0.1ms 2.3MB 23ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 115ms 2.7ms 81.5MB 143ms 27ms graal/jvm 17.0.8
java 1-m.java 117ms 1.5ms 45.3MB 157ms 20ms openjdk 21
java 1.java 118ms 3.8ms 48.1MB 157ms 17ms openjdk 23
java 1.java 241ms 4.9ms 44.6MB 157ms 140ms openjdk/zgc 21
java 2-m.java 289ms 5.6ms 371.1MB 420ms 57ms openjdk 21
java 2-m.java 305ms 7.2ms 418.7MB 450ms 57ms openjdk 23
java 2.java 680ms 10ms 526.8MB 463ms 403ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 386ms 4.5ms 115.4MB 440ms 17ms openjdk 21
java 1.java 400ms 5.1ms 118.2MB 440ms 23ms openjdk 23
cpp 1.cpp 485ms 1.3ms 7.3MB 473ms 0ms g++ 11.4.0
cpp 1.cpp 526ms 2.2ms 7.8MB 517ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 563ms 9.0ms 112.7MB 473ms 163ms openjdk/zgc 21
java 1-m.java 597ms 12ms 270.7MB 853ms 83ms graal/jvm 17.0.8
java 2.java 779ms 4.4ms 60.6MB 827ms 20ms openjdk 23
java 2.java 780ms 4.0ms 57.3MB 843ms 20ms openjdk 21
java 2.java 835ms 8.1ms 53.1MB 767ms 137ms openjdk/zgc 21
java 2-m.java 1339ms 38ms 269.6MB 2393ms 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 120ms 1.4ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 131ms 0.7ms 4.0MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 152ms 0.7ms 67.9MB 200ms 17ms openjdk 23
java 1.java 158ms 5.5ms 64.9MB 210ms 17ms openjdk 21
java 1-m.java 199ms 1.5ms 124.8MB 287ms 37ms graal/jvm 17.0.8
java 2.java 256ms 1.2ms 49.8MB 317ms 20ms openjdk 21
java 2.java 260ms 1.5ms 50.4MB 313ms 17ms openjdk 23
java 1.java 281ms 0.9ms 61.2MB 200ms 143ms openjdk/zgc 21
java 2.java 366ms 2.7ms 47.4MB 307ms 137ms openjdk/zgc 21
java 2-m.java 472ms 6.2ms 144.5MB 843ms 60ms 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 3.7ms 3.5MB 1823ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 482ms 1.3ms 2.1MB 1887ms 0ms g++ 11.4.0
cpp 6-im.cpp 917ms 0.3ms 3.4MB 3603ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 920ms 1.7ms 2.1MB 3617ms 0ms g++ 11.4.0
java 2-m.java 1986ms 9.7ms 47.8MB 7600ms 27ms openjdk 21
java 2-m.java 1987ms 18ms 48.7MB 7617ms 30ms openjdk 23
java 2-m.java 2117ms 11ms 45.8MB 7620ms 153ms openjdk/zgc 21
java 2-m.java 2514ms 6.9ms 94.5MB 9423ms 43ms 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 123ms 0.4ms 3.4MB 457ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 0.5ms 2.0MB 480ms 0ms g++ 11.4.0
cpp 6-im.cpp 236ms 0.8ms 3.4MB 900ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 238ms 0.2ms 2.1MB 920ms 0ms g++ 11.4.0
java 2-m.java 599ms 0.5ms 47.8MB 2133ms 23ms openjdk 21
java 2-m.java 614ms 4.8ms 49.0MB 2180ms 20ms openjdk 23
java 2-m.java 737ms 1.7ms 45.5MB 2183ms 140ms openjdk/zgc 21
java 2-m.java 761ms 25ms 95.2MB 2687ms 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 0.4ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 8.7ms 3.5MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 65ms 1.3ms 3.4MB 230ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 66ms 0.2ms 2.0MB 240ms 0ms g++ 11.4.0
java 2-m.java 249ms 6.5ms 47.4MB 737ms 17ms openjdk 21
java 2-m.java 257ms 2.4ms 48.6MB 783ms 20ms openjdk 23
java 2-m.java 310ms 29ms 95.0MB 947ms 40ms graal/jvm 17.0.8
java 2-m.java 377ms 11ms 45.3MB 767ms 143ms openjdk/zgc 21