Programming Language and compiler
Benchmarks

C VS D benchmarks

Current benchmark data was generated on Sat Mar 29 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 0.1ms 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 1.7ms 0.1ms 3.0MB 0ms 0ms ldc2 1.40.1
d 1.d 2.4ms 0.3ms 5.1MB 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 173ms 3.2ms 23.6MB 420ms 3ms gcc 14.2.0
c 1-m.c 290ms 4.8ms 25.9MB 990ms 27ms clang 14.0.0-1ubuntu1.1
d 1-m.d 661ms 57ms 47.3MB 2080ms 10ms ldc2 1.40.1
d 1-m.d 1944ms 22ms 49.6MB 6397ms 37ms 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 2.1ms 12.6MB 63ms 0ms gcc 14.2.0
c 1-m.c 38ms 1.5ms 15.1MB 107ms 0ms clang 14.0.0-1ubuntu1.1
d 1-m.d 91ms 3.3ms 38.7MB 247ms 10ms ldc2 1.40.1
d 1-m.d 230ms 15ms 40.3MB 657ms 23ms 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 220ms 13ms 7.7MB 827ms 13ms clang 14.0.0-1ubuntu1.1
c 1-mffi.c 263ms 0.5ms 6.5MB 810ms 0ms gcc 14.2.0
d 1.d 294ms 0.8ms 7.0MB 280ms 0ms ldc2 1.40.1
c 1-mffi.c 331ms 2.1ms 5.9MB 320ms 0ms zigcc 0.14.0
c 1-ffi.c 334ms 0.7ms 5.9MB 327ms 0ms zigcc 0.14.0
c 1-ffi.c 452ms 0.7ms 6.5MB 440ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 543ms 1.7ms 6.5MB 533ms 0ms gcc 14.2.0
d 1.d 2202ms 23ms 9.0MB 2193ms 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 0.1ms 3.0MB 10ms 0ms ldc2 1.40.1
c 1-mffi.c 16ms 1.1ms 4.8MB 33ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 16ms 0.2ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 16ms 0.2ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 18ms 1.5ms 3.6MB 43ms 0ms gcc 14.2.0
c 1-ffi.c 22ms 0.4ms 3.6MB 10ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 26ms 0.9ms 3.6MB 20ms 0ms gcc 14.2.0
d 1.d 98ms 3.5ms 4.5MB 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 267ms 1.0ms 1.5MB 260ms 0ms zigcc 0.14.0
c 8-i.c 303ms 1.5ms 2.1MB 293ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 309ms 0.2ms 2.3MB 300ms 0ms gcc 14.2.0
c 5.c 313ms 0.9ms 2.3MB 303ms 0ms gcc 14.2.0
c 2.c 315ms 1.3ms 1.5MB 307ms 0ms zigcc 0.14.0
c 5.c 317ms 1.3ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 317ms 2.2ms 1.5MB 307ms 0ms zigcc 0.14.0
c 2.c 318ms 1.5ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 337ms 4.9ms 2.3MB 323ms 0ms gcc 14.2.0
d 2.d 361ms 0.7ms 2.8MB 350ms 0ms ldc2 1.40.1
d 1.d 362ms 1.6ms 2.9MB 350ms 0ms ldc2 1.40.1
d 1.d 682ms 2.8ms 4.6MB 670ms 0ms dmd 2.110.0
d 2.d 2081ms 79ms 4.5MB 2070ms 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 29ms 0.4ms 1.5MB 20ms 0ms zigcc 0.14.0
c 8-i.c 32ms 0.4ms 2.1MB 23ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 34ms 0.5ms 2.3MB 27ms 0ms gcc 14.2.0
c 2.c 34ms 0.9ms 1.5MB 27ms 0ms zigcc 0.14.0
c 2.c 34ms 0.3ms 2.3MB 27ms 0ms gcc 14.2.0
c 5.c 34ms 0.8ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 35ms 0.6ms 1.5MB 30ms 0ms zigcc 0.14.0
c 8-i.c 36ms 0.1ms 2.3MB 30ms 0ms gcc 14.2.0
c 2.c 37ms 2.3ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
d 1.d 39ms 0.4ms 2.9MB 30ms 0ms ldc2 1.40.1
d 2.d 40ms 0.3ms 2.8MB 30ms 0ms ldc2 1.40.1
d 1.d 73ms 0.3ms 4.5MB 60ms 0ms dmd 2.110.0
d 2.d 208ms 2.7ms 4.6MB 200ms 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 287ms 2.0ms 40.9MB 270ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 297ms 3.9ms 40.2MB 283ms 0ms zigcc 0.14.0
c 1.c 315ms 5.4ms 40.9MB 300ms 0ms gcc 14.2.0
d 1.d 324ms 19ms 45.1MB 307ms 0ms ldc2 1.40.1
d 1.d 368ms 7.4ms 77.3MB 353ms 0ms dmd 2.110.0
d 2.d 846ms 3.0ms 49.1MB 827ms 7ms ldc2 1.40.1
d 2.d 1177ms 6.0ms 51.2MB 1163ms 3ms dmd 2.110.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 54ms 0.7ms 11.0MB 40ms 0ms zigcc 0.14.0
c 1.c 56ms 4.6ms 11.6MB 47ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 58ms 7.5ms 11.6MB 47ms 0ms gcc 14.2.0
d 1.d 64ms 2.8ms 15.0MB 50ms 0ms ldc2 1.40.1
d 1.d 77ms 2.3ms 27.2MB 67ms 0ms dmd 2.110.0
d 2.d 209ms 1.8ms 17.0MB 200ms 0ms ldc2 1.40.1
d 2.d 294ms 2.2ms 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 967ms 9.4ms 2.0MB 3783ms 0ms gcc 14.2.0
c 4-m.c 982ms 12ms 2.0MB 3837ms 0ms gcc 14.2.0
c 6-im.c 1008ms 2.8ms 3.4MB 3950ms 3ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1095ms 0.3ms 2.0MB 4303ms 0ms gcc 14.2.0
c 4-m.c 1125ms 1.9ms 3.3MB 4407ms 7ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1351ms 16ms 3.4MB 5283ms 10ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1874ms 45ms 3.1MB 7307ms 17ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1977ms 3.1ms 2.0MB 7780ms 0ms gcc 14.2.0
d 1.d 3594ms 1.3ms 3.9MB 3580ms 0ms ldc2 1.40.1
d 1.d 3667ms 17ms 5.9MB 3657ms 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 249ms 3.6ms 2.0MB 950ms 0ms gcc 14.2.0
c 4-m.c 254ms 2.6ms 2.0MB 970ms 0ms gcc 14.2.0
c 6-im.c 263ms 2.7ms 3.3MB 1000ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 290ms 14ms 2.0MB 1100ms 0ms gcc 14.2.0
c 4-m.c 292ms 3.6ms 3.1MB 1110ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 343ms 4.7ms 3.3MB 1320ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 472ms 11ms 3.1MB 1810ms 3ms clang 14.0.0-1ubuntu1.1
c 3-m.c 499ms 3.0ms 2.0MB 1940ms 0ms gcc 14.2.0
d 1.d 901ms 1.7ms 3.5MB 890ms 0ms ldc2 1.40.1
d 1.d 924ms 11ms 5.1MB 913ms 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 0.2ms 2.0MB 253ms 0ms gcc 14.2.0
c 6-im.c 72ms 0.2ms 3.3MB 250ms 0ms clang 14.0.0-1ubuntu1.1
c 6-im.c 77ms 13ms 2.0MB 263ms 0ms gcc 14.2.0
c 4-m.c 80ms 1.2ms 3.3MB 280ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 81ms 2.6ms 2.0MB 290ms 0ms gcc 14.2.0
c 5-im.c 95ms 5.2ms 3.4MB 340ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 123ms 0.8ms 3.4MB 453ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 133ms 4.0ms 2.0MB 497ms 0ms gcc 14.2.0
d 1.d 228ms 0.5ms 3.1MB 220ms 0ms ldc2 1.40.1
d 1.d 234ms 2.2ms 7.5MB 223ms 0ms dmd 2.110.0