Programming Language and compiler
Benchmarks

C++ VS Java benchmarks

Current benchmark data was generated on Tue Mar 25 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 400ms 5.5ms 2.6MB 1540ms 0ms g++ 11.4.0
cpp 1-im.cpp 409ms 4.1ms 4.0MB 1590ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1-m.java 894ms 11ms 95.4MB 3297ms 43ms graal/jvm 17.0.8
java 1-m.java 974ms 4.1ms 48.1MB 3630ms 23ms openjdk 21
java 1-m.java 991ms 2.3ms 50.2MB 3637ms 23ms openjdk 23
java 1-m.java 1026ms 24ms 45.7MB 3350ms 143ms openjdk/zgc 21

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 41ms 1.5ms 2.6MB 133ms 0ms g++ 11.4.0
cpp 1-im.cpp 42ms 0.4ms 4.0MB 140ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1-m.java 182ms 6.0ms 48.3MB 493ms 27ms openjdk 21
java 1-m.java 195ms 3.7ms 50.0MB 510ms 20ms openjdk 23
java 1-m.java 210ms 15ms 96.2MB 583ms 43ms graal/jvm 17.0.8
java 1-m.java 307ms 8.3ms 46.8MB 500ms 143ms openjdk/zgc 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.1ms 0.1ms 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 63ms 2.8ms 52.7MB 70ms 16ms graal/jvm 17.0.8
java 1.java 65ms 2.6ms 43.7MB 74ms 16ms openjdk 21
java 1.java 69ms 4.7ms 44.7MB 72ms 16ms openjdk 23
java 1.java 199ms 6.8ms 42.9MB 84ms 138ms 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 0.1ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.5ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 315ms 0.8ms 2.3MB 307ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 316ms 0.4ms 1.8MB 307ms 0ms g++ 11.4.0
java 1.java 445ms 1.2ms 45.1MB 487ms 17ms openjdk 21
java 1.java 448ms 0.8ms 48.1MB 483ms 20ms openjdk 23
java 1.java 451ms 5.3ms 82.3MB 480ms 30ms graal/jvm 17.0.8
java 1.java 570ms 6.7ms 44.6MB 483ms 140ms openjdk/zgc 21
java 2.java 1247ms 8.3ms 612.0MB 1383ms 87ms openjdk 21
java 2.java 1263ms 12ms 761.8MB 1380ms 107ms openjdk 23
java 2.java 3428ms 91ms 2585.6MB 1647ms 1983ms 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 0.7ms 1.9MB 30ms 0ms g++ 11.4.0
cpp 1.cpp 34ms 0.7ms 2.3MB 30ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 120ms 1.3ms 45.2MB 160ms 20ms openjdk 21
java 1.java 122ms 3.4ms 48.0MB 157ms 17ms openjdk 23
java 1.java 126ms 6.4ms 81.5MB 157ms 30ms graal/jvm 17.0.8
java 1.java 255ms 8.1ms 44.8MB 173ms 147ms openjdk/zgc 21
java 2-m.java 305ms 1.9ms 374.3MB 440ms 63ms openjdk 21
java 2-m.java 314ms 3.5ms 404.5MB 453ms 67ms openjdk 23
java 2.java 718ms 16ms 545.0MB 480ms 433ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 414ms 8.0ms 115.1MB 463ms 23ms openjdk 21
java 1.java 417ms 11ms 118.0MB 453ms 27ms openjdk 23
cpp 1.cpp 485ms 2.1ms 7.3MB 477ms 0ms g++ 11.4.0
cpp 1.cpp 531ms 3.5ms 7.8MB 523ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 598ms 4.7ms 112.6MB 497ms 167ms openjdk/zgc 21
java 1-m.java 645ms 4.3ms 256.4MB 920ms 83ms graal/jvm 17.0.8
java 2.java 783ms 3.4ms 57.0MB 837ms 23ms openjdk 21
java 2.java 785ms 6.3ms 60.3MB 833ms 23ms openjdk 23
java 2.java 856ms 3.3ms 53.4MB 780ms 150ms openjdk/zgc 21
java 2-m.java 1326ms 70ms 214.5MB 2320ms 103ms graal/jvm 17.0.8

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 119ms 0.4ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 133ms 1.4ms 4.1MB 123ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 158ms 11ms 68.1MB 193ms 30ms openjdk 23
java 1.java 159ms 1.7ms 64.7MB 210ms 20ms openjdk 21
java 1-m.java 209ms 17ms 124.7MB 293ms 43ms graal/jvm 17.0.8
java 2.java 261ms 1.6ms 50.5MB 313ms 17ms openjdk 23
java 2.java 261ms 1.8ms 49.9MB 320ms 20ms openjdk 21
java 1.java 292ms 2.3ms 61.4MB 210ms 157ms openjdk/zgc 21
java 2.java 371ms 7.0ms 47.7MB 307ms 143ms openjdk/zgc 21
java 2-m.java 474ms 3.4ms 194.3MB 833ms 70ms 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 474ms 9.5ms 3.5MB 1827ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 484ms 1.5ms 2.1MB 1883ms 0ms g++ 11.4.0
cpp 6-im.cpp 927ms 9.1ms 2.1MB 3633ms 0ms g++ 11.4.0
cpp 6-im.cpp 928ms 16ms 3.6MB 3630ms 0ms clang++ 14.0.0-1ubuntu1.1
java 2-m.java 1990ms 4.9ms 48.3MB 7590ms 23ms openjdk 21
java 2-m.java 2007ms 4.6ms 48.8MB 7640ms 23ms openjdk 23
java 2-m.java 2118ms 9.6ms 45.4MB 7597ms 150ms openjdk/zgc 21
java 2-m.java 2519ms 21ms 94.5MB 9413ms 47ms 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 0.6ms 3.4MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 130ms 0.6ms 2.0MB 490ms 0ms g++ 11.4.0
cpp 6-im.cpp 238ms 0.5ms 3.4MB 903ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 240ms 2.0ms 2.1MB 917ms 0ms g++ 11.4.0
java 2-m.java 603ms 2.9ms 47.6MB 2127ms 23ms openjdk 21
java 2-m.java 618ms 4.6ms 49.0MB 2187ms 27ms openjdk 23
java 2-m.java 737ms 4.9ms 45.5MB 2160ms 147ms openjdk/zgc 21
java 2-m.java 775ms 11ms 95.1MB 2713ms 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 0.2ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 9.9ms 3.4MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 65ms 0.7ms 3.4MB 230ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 67ms 0.4ms 2.1MB 240ms 0ms g++ 11.4.0
java 2-m.java 255ms 0.5ms 47.6MB 760ms 23ms openjdk 21
java 2-m.java 259ms 11ms 48.6MB 767ms 20ms openjdk 23
java 2-m.java 305ms 26ms 96.4MB 910ms 50ms graal/jvm 17.0.8
java 2-m.java 384ms 3.8ms 45.7MB 763ms 150ms openjdk/zgc 21