Programming Language and compiler
Benchmarks

Swift VS C benchmarks

Current benchmark data was generated on Mon Apr 14 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.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2675ms 16ms 53.8MB 2643ms 20ms swift 6.1.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 239ms 3.9ms 11.8MB 227ms 0ms swift 6.1.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2491ms 11ms 5.5MB 2480ms 0ms swift 6.1.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 213ms 3.7ms 6.3MB 203ms 0ms swift 6.1.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3-m.swift 146ms 0.8ms 20.8MB 433ms 0ms swift 6.1.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3.swift 38ms 0.4ms 18.2MB 37ms 0ms swift 6.1.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 1.1ms 0.1ms 1.3MB 0ms 0ms zigcc 0.14.0
c 1.c 1.2ms 0.1ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 1.2ms 0.1ms 2.1MB 0ms 0ms gcc 14.2.0
swift 1.swift 2.3ms 0.2ms 5.8MB 0ms 0ms swift 6.1.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 182ms 2.9ms 24.5MB 420ms 7ms gcc 14.2.0
c 1-m.c 291ms 5.0ms 25.9MB 980ms 17ms clang 14.0.0-1ubuntu1.1
swift 2-m.swift 1336ms 17ms 70.7MB 4880ms 30ms swift 6.1.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 28ms 2.9ms 12.1MB 63ms 0ms gcc 14.2.0
c 1-m.c 35ms 0.6ms 15.1MB 100ms 0ms clang 14.0.0-1ubuntu1.1
swift 2-m.swift 248ms 2.1ms 60.0MB 663ms 23ms swift 6.1.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 267ms 0.5ms 1.5MB 260ms 0ms zigcc 0.14.0
c 8-i.c 302ms 1.0ms 2.1MB 290ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 311ms 0.4ms 2.3MB 300ms 0ms gcc 14.2.0
c 5.c 315ms 0.7ms 2.3MB 303ms 0ms gcc 14.2.0
c 2.c 315ms 1.4ms 1.5MB 310ms 0ms zigcc 0.14.0
c 5.c 315ms 0.9ms 1.5MB 307ms 0ms zigcc 0.14.0
c 5.c 318ms 3.4ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 320ms 0.6ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 334ms 0.4ms 2.3MB 323ms 0ms gcc 14.2.0
swift 7.swift 344ms 2.0ms 10.0MB 330ms 0ms swift 6.1.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 29ms 0.2ms 1.5MB 20ms 0ms zigcc 0.14.0
c 8-i.c 33ms 0.4ms 2.1MB 23ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 34ms 0.3ms 2.3MB 30ms 0ms gcc 14.2.0
c 5.c 34ms 0.5ms 1.5MB 27ms 0ms zigcc 0.14.0
c 2.c 34ms 0.6ms 2.3MB 27ms 0ms gcc 14.2.0
c 2.c 34ms 0.2ms 1.5MB 30ms 0ms zigcc 0.14.0
c 2.c 35ms 0.8ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 35ms 0.7ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 36ms 0.2ms 2.3MB 30ms 0ms gcc 14.2.0
swift 7.swift 39ms 0.2ms 10.0MB 30ms 0ms swift 6.1.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift timeout 0.0ms 7.1MB 4937ms 50ms swift 6.1.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 1928ms 4.2ms 7.0MB 1913ms 0ms swift 6.1.0