Programming Language and compiler
Benchmarks

Swift VS Dart benchmarks

Current benchmark data was generated on Fri Aug 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
dart 1.dart 711ms 6.5ms 80.9MB 683ms 37ms dart/exe 3.8.2
swift 1.swift 2661ms 31ms 53.6MB 2630ms 17ms swift 6.1.2

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 1.dart 75ms 0.6ms 43.0MB 53ms 13ms dart/exe 3.8.2
swift 1.swift 242ms 3.3ms 11.9MB 230ms 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 2469ms 4.7ms 5.4MB 2460ms 0ms swift 6.1.2
dart 2.dart 2667ms 7.7ms 6.3MB 2657ms 0ms dart/exe 3.8.2

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 213ms 0.4ms 6.1MB 200ms 0ms swift 6.1.2
dart 2.dart 219ms 1.0ms 6.3MB 210ms 0ms dart/exe 3.8.2

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3-m.swift 138ms 0.6ms 20.7MB 400ms 3ms swift 6.1.2
dart 1.dart 362ms 3.2ms 8.6MB 350ms 0ms dart/exe 3.8.2

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3.swift 37ms 0.3ms 14.2MB 30ms 0ms swift 6.1.2
dart 1.dart 42ms 0.8ms 8.6MB 30ms 0ms dart/exe 3.8.2

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2.2ms 0.2ms 5.6MB 0ms 0ms swift 6.1.2
dart 1.dart 3.5ms 0.3ms 5.3MB 0ms 0ms dart/exe 3.8.2

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 3-m.dart 1071ms 18ms 277.5MB 3220ms 113ms dart/exe 3.8.2
swift 2-m.swift 1313ms 5.4ms 70.6MB 4803ms 27ms swift 6.1.2

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 3-m.dart 217ms 3.0ms 186.9MB 517ms 70ms dart/exe 3.8.2
swift 2-m.swift 250ms 2.2ms 60.0MB 663ms 30ms swift 6.1.2

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 343ms 0.8ms 9.9MB 330ms 0ms swift 6.1.2
dart 3.dart 408ms 3.1ms 6.3MB 397ms 0ms dart/exe 3.8.2

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 39ms 0.1ms 9.8MB 30ms 0ms swift 6.1.2
dart 3.dart 45ms 0.4ms 6.5MB 40ms 0ms dart/exe 3.8.2

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 2.dart 1254ms 16ms 14.8MB 1220ms 33ms dart/exe 3.8.2
swift 1.swift timeout 0.0ms 7.3MB 4930ms 57ms swift 6.1.2

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 2.dart 305ms 6.1ms 14.8MB 283ms 13ms dart/exe 3.8.2
swift 1.swift 1856ms 13ms 7.0MB 1847ms 0ms swift 6.1.2