Programming Language and compiler
Benchmarks

C VS D 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.)

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 1.0ms 0.0ms 1.4MB 0ms 0ms zigcc 0.14.0
c 1.c 1.2ms 0.1ms 2.1MB 0ms 0ms gcc 14.2.0
c 1.c 1.3ms 0.1ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
d 1.d 1.6ms 0.1ms 3.0MB 0ms 0ms ldc2 1.40.1
d 1.d 2.2ms 0.3ms 5.0MB 0ms 0ms dmd 2.110.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 178ms 4.6ms 22.8MB 420ms 3ms gcc 14.2.0
c 1-m.c 317ms 51ms 25.9MB 1090ms 27ms clang 14.0.0-1ubuntu1.1
d 1-m.d 646ms 11ms 55.2MB 2187ms 10ms ldc2 1.40.1
d 1-m.d 1874ms 24ms 47.5MB 5737ms 10ms dmd 2.110.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 28ms 1.6ms 13.9MB 63ms 0ms gcc 14.2.0
c 1-m.c 36ms 0.8ms 15.1MB 100ms 3ms clang 14.0.0-1ubuntu1.1
d 1-m.d 96ms 3.1ms 38.7MB 253ms 10ms ldc2 1.40.1
d 1-m.d 206ms 5.7ms 38.1MB 603ms 10ms dmd 2.110.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 222ms 13ms 7.6MB 827ms 10ms clang 14.0.0-1ubuntu1.1
c 1-mffi.c 265ms 2.3ms 6.7MB 810ms 0ms gcc 14.2.0
d 1.d 295ms 0.7ms 7.0MB 283ms 0ms ldc2 1.40.1
c 1-mffi.c 332ms 2.1ms 5.9MB 320ms 0ms zigcc 0.14.0
c 1-ffi.c 332ms 2.5ms 5.9MB 323ms 0ms zigcc 0.14.0
c 1-ffi.c 456ms 4.1ms 6.4MB 443ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 541ms 2.5ms 6.7MB 530ms 0ms gcc 14.2.0
d 1.d 2187ms 22ms 9.0MB 2177ms 0ms dmd 2.110.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 15ms 0.3ms 3.0MB 10ms 0ms ldc2 1.40.1
c 1-ffi.c 16ms 0.1ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 16ms 0.1ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 18ms 1.7ms 3.8MB 43ms 0ms gcc 14.2.0
c 1-mffi.c 18ms 1.6ms 4.6MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 22ms 0.1ms 3.6MB 10ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 26ms 1.0ms 3.8MB 20ms 0ms gcc 14.2.0
d 1.d 96ms 1.6ms 4.8MB 90ms 0ms dmd 2.110.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 270ms 3.5ms 1.5MB 263ms 0ms zigcc 0.14.0
c 8-i.c 303ms 0.8ms 2.1MB 290ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 310ms 0.8ms 2.3MB 300ms 0ms gcc 14.2.0
c 5.c 313ms 0.8ms 2.3MB 307ms 0ms gcc 14.2.0
c 5.c 317ms 0.3ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 317ms 5.6ms 1.5MB 303ms 0ms zigcc 0.14.0
c 5.c 318ms 3.5ms 1.5MB 310ms 0ms zigcc 0.14.0
c 2.c 318ms 2.2ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 333ms 0.4ms 2.3MB 320ms 0ms gcc 14.2.0
d 1.d 362ms 1.8ms 2.9MB 350ms 0ms ldc2 1.40.1
d 2.d 362ms 0.4ms 2.9MB 350ms 0ms ldc2 1.40.1
d 1.d 682ms 4.0ms 4.6MB 673ms 0ms dmd 2.110.0
d 2.d 2040ms 13ms 4.6MB 2033ms 0ms dmd 2.110.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 31ms 4.1ms 1.5MB 23ms 0ms zigcc 0.14.0
c 8-i.c 34ms 0.5ms 2.3MB 27ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 34ms 0.5ms 2.3MB 30ms 0ms gcc 14.2.0
c 2.c 34ms 0.3ms 1.5MB 30ms 0ms zigcc 0.14.0
c 5.c 34ms 0.1ms 2.3MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 34ms 0.3ms 2.3MB 30ms 0ms gcc 14.2.0
c 5.c 35ms 0.6ms 1.5MB 30ms 0ms zigcc 0.14.0
c 8-i.c 36ms 0.2ms 2.3MB 30ms 0ms gcc 14.2.0
d 2.d 39ms 0.1ms 2.9MB 30ms 0ms ldc2 1.40.1
d 1.d 39ms 0.4ms 2.9MB 30ms 0ms ldc2 1.40.1
c 2.c 40ms 2.3ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
d 1.d 71ms 0.3ms 4.6MB 60ms 0ms dmd 2.110.0
d 2.d 210ms 3.6ms 4.5MB 203ms 0ms dmd 2.110.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 292ms 7.4ms 41.0MB 277ms 0ms gcc 14.2.0
c 1.c 327ms 8.1ms 40.2MB 310ms 0ms zigcc 0.14.0
d 1.d 330ms 2.6ms 43.1MB 317ms 3ms ldc2 1.40.1
c 1.c 337ms 20ms 40.8MB 317ms 0ms clang 14.0.0-1ubuntu1.1
d 1.d 369ms 6.5ms 77.3MB 353ms 7ms dmd 2.110.0
d 2.d 843ms 1.5ms 46.9MB 823ms 0ms ldc2 1.40.1
d 2.d 1168ms 2.1ms 48.7MB 1150ms 10ms dmd 2.110.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 53ms 4.6ms 11.8MB 43ms 0ms gcc 14.2.0
c 1.c 55ms 2.0ms 11.6MB 43ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 60ms 1.3ms 11.0MB 50ms 0ms zigcc 0.14.0
d 1.d 64ms 1.5ms 15.0MB 57ms 0ms ldc2 1.40.1
d 1.d 77ms 3.4ms 27.2MB 67ms 0ms dmd 2.110.0
d 2.d 209ms 2.5ms 17.1MB 200ms 0ms ldc2 1.40.1
d 2.d 294ms 1.0ms 18.9MB 280ms 0ms dmd 2.110.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 6-im.c 958ms 2.2ms 2.0MB 3770ms 0ms gcc 14.2.0
c 4-m.c 968ms 2.7ms 2.0MB 3810ms 0ms gcc 14.2.0
c 6-im.c 1011ms 12ms 3.3MB 3953ms 7ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1099ms 17ms 2.0MB 4293ms 3ms gcc 14.2.0
c 4-m.c 1132ms 16ms 3.1MB 4430ms 7ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1333ms 5.5ms 3.3MB 5243ms 3ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1845ms 24ms 3.3MB 7243ms 10ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1975ms 10ms 2.3MB 7780ms 7ms gcc 14.2.0
d 1.d 3600ms 4.4ms 3.9MB 3587ms 0ms ldc2 1.40.1
d 1.d 3654ms 31ms 5.9MB 3643ms 0ms dmd 2.110.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 6-im.c 247ms 0.9ms 2.0MB 943ms 0ms gcc 14.2.0
c 4-m.c 252ms 1.3ms 2.1MB 967ms 0ms gcc 14.2.0
c 6-im.c 263ms 2.8ms 3.3MB 993ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 287ms 8.2ms 2.0MB 1100ms 0ms gcc 14.2.0
c 4-m.c 289ms 1.7ms 3.3MB 1110ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 342ms 1.1ms 3.3MB 1313ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 496ms 43ms 3.3MB 1873ms 7ms clang 14.0.0-1ubuntu1.1
c 3-m.c 497ms 0.9ms 2.0MB 1940ms 0ms gcc 14.2.0
d 1.d 901ms 1.0ms 3.8MB 890ms 0ms ldc2 1.40.1
d 1.d 922ms 0.8ms 7.6MB 910ms 0ms dmd 2.110.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 4-m.c 71ms 0.4ms 2.0MB 257ms 0ms gcc 14.2.0
c 6-im.c 73ms 4.0ms 3.3MB 253ms 0ms clang 14.0.0-1ubuntu1.1
c 6-im.c 75ms 7.5ms 2.0MB 263ms 0ms gcc 14.2.0
c 5-im.c 79ms 1.5ms 2.0MB 280ms 0ms gcc 14.2.0
c 4-m.c 79ms 0.8ms 3.1MB 280ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 92ms 1.5ms 3.1MB 327ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 126ms 3.1ms 3.1MB 453ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 131ms 1.1ms 2.0MB 493ms 0ms gcc 14.2.0
d 1.d 228ms 0.3ms 3.0MB 220ms 0ms ldc2 1.40.1
d 1.d 233ms 1.2ms 5.0MB 220ms 0ms dmd 2.110.0