Programming Language and compiler
Benchmarks

Swift VS C 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.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2555ms 26ms 53.8MB 2523ms 20ms swift 6.1.2

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 232ms 3.0ms 11.9MB 220ms 0ms swift 6.1.2

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2480ms 2.8ms 5.5MB 2470ms 0ms swift 6.1.2

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 214ms 2.6ms 5.5MB 207ms 0ms swift 6.1.2

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3-m.swift 146ms 1.6ms 21.0MB 433ms 3ms swift 6.1.2

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3.swift 38ms 0.4ms 14.4MB 33ms 0ms swift 6.1.2

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 0.14.1
c 1.c 1.2ms 0.0ms 2.1MB 0ms 0ms gcc 15.1.0
c 1.c 1.2ms 0.0ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
swift 1.swift 2.4ms 0.2ms 5.9MB 0ms 0ms swift 6.1.2

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 172ms 2.2ms 23.6MB 403ms 7ms gcc 15.1.0
c 1-m.c 292ms 0.1ms 25.7MB 1000ms 27ms clang 14.0.0-1ubuntu1.1
swift 2-m.swift 1326ms 10ms 74.3MB 4847ms 33ms swift 6.1.2

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 26ms 1.5ms 13.0MB 57ms 3ms gcc 15.1.0
c 1-m.c 36ms 1.0ms 15.0MB 103ms 0ms clang 14.0.0-1ubuntu1.1
swift 2-m.swift 249ms 1.6ms 60.1MB 660ms 27ms swift 6.1.2

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 270ms 3.2ms 1.5MB 263ms 0ms zigcc 0.14.1
c 8-i.c 303ms 3.1ms 2.1MB 293ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 309ms 1.0ms 2.3MB 300ms 0ms gcc 15.1.0
c 2.c 313ms 2.0ms 1.5MB 303ms 0ms zigcc 0.14.1
c 5.c 313ms 1.2ms 2.3MB 307ms 0ms gcc 15.1.0
c 5.c 315ms 1.6ms 1.5MB 307ms 0ms zigcc 0.14.1
c 5.c 315ms 1.6ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 322ms 4.3ms 2.1MB 317ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 337ms 1.0ms 2.3MB 330ms 0ms gcc 15.1.0
swift 7.swift 343ms 1.2ms 10.1MB 333ms 0ms swift 6.1.2

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 29ms 0.6ms 1.5MB 20ms 0ms zigcc 0.14.1
c 8-i.c 33ms 0.2ms 2.1MB 20ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 33ms 0.3ms 1.5MB 30ms 0ms zigcc 0.14.1
c 5.c 33ms 0.3ms 2.3MB 30ms 0ms gcc 15.1.0
c 5.c 34ms 0.4ms 1.5MB 27ms 0ms zigcc 0.14.1
c 2.c 34ms 0.9ms 2.3MB 27ms 0ms gcc 15.1.0
c 5.c 34ms 1.0ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 34ms 0.7ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 35ms 0.1ms 2.3MB 30ms 0ms gcc 15.1.0
swift 7.swift 39ms 1.3ms 10.3MB 30ms 0ms swift 6.1.2

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 4920ms 67ms swift 6.1.2

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 1831ms 3.2ms 7.0MB 1813ms 0ms swift 6.1.2