Programming Language and compiler
Benchmarks

Swift VS Dart 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
dart 1.dart 706ms 4.7ms 80.9MB 673ms 37ms dart/exe 3.8.1
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
dart 1.dart 74ms 0.3ms 43.0MB 50ms 13ms dart/exe 3.8.1
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
dart 2.dart 2684ms 4.0ms 6.3MB 2673ms 0ms dart/exe 3.8.1

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
dart 2.dart 222ms 2.2ms 6.4MB 210ms 0ms dart/exe 3.8.1

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
dart 1.dart 359ms 0.6ms 8.8MB 350ms 0ms dart/exe 3.8.1

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
dart 1.dart 42ms 0.7ms 8.8MB 30ms 0ms dart/exe 3.8.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2.4ms 0.2ms 5.9MB 0ms 0ms swift 6.1.2
dart 1.dart 3.6ms 0.2ms 6.5MB 0ms 0ms dart/exe 3.8.1

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 3-m.dart 1102ms 13ms 276.2MB 3277ms 130ms dart/exe 3.8.1
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
dart 3-m.dart 213ms 1.6ms 186.5MB 513ms 67ms dart/exe 3.8.1
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
swift 7.swift 343ms 1.2ms 10.1MB 333ms 0ms swift 6.1.2
dart 3.dart 407ms 2.1ms 6.3MB 397ms 0ms dart/exe 3.8.1

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 39ms 1.3ms 10.3MB 30ms 0ms swift 6.1.2
dart 3.dart 46ms 0.2ms 6.3MB 40ms 0ms dart/exe 3.8.1

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 2.dart 1248ms 3.9ms 14.8MB 1217ms 33ms dart/exe 3.8.1
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
dart 2.dart 312ms 2.1ms 14.8MB 297ms 17ms dart/exe 3.8.1
swift 1.swift 1831ms 3.2ms 7.0MB 1813ms 0ms swift 6.1.2