Programming Language and compiler
Benchmarks

Swift VS Rust benchmarks

Current benchmark data was generated on Tue Mar 25 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
rust 4.rs 1295ms 3.8ms 33.6MB 1273ms 10ms rustc 1.85.1
rust 5.rs 1401ms 21ms 33.8MB 1377ms 7ms rustc 1.85.1
rust 3.rs 1556ms 12ms 49.8MB 1523ms 20ms rustc 1.85.1
swift 1.swift 2950ms 76ms 53.9MB 2917ms 20ms swift 6.0.3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4.rs 123ms 2.5ms 5.8MB 113ms 0ms rustc 1.85.1
rust 5.rs 127ms 3.9ms 5.8MB 117ms 0ms rustc 1.85.1
rust 3.rs 136ms 2.8ms 7.8MB 123ms 0ms rustc 1.85.1
swift 1.swift 237ms 1.1ms 11.9MB 227ms 0ms swift 6.0.3

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 412ms 1.0ms 2.0MB 1580ms 0ms rustc 1.85.1
rust 5-m.rs 575ms 7.0ms 2.1MB 2190ms 0ms rustc 1.85.1
rust 2-im.rs 623ms 2.8ms 2.0MB 2400ms 0ms rustc 1.85.1
rust 1-m.rs 994ms 7.8ms 2.1MB 3783ms 0ms rustc 1.85.1
rust 3-i.rs 1500ms 1.0ms 1.9MB 1490ms 0ms rustc 1.85.1
rust 2-i.rs 1765ms 5.9ms 1.8MB 1757ms 0ms rustc 1.85.1
swift 1.swift 2483ms 17ms 5.6MB 2473ms 0ms swift 6.0.3
rust 1.rs 2681ms 4.0ms 1.8MB 2673ms 0ms rustc 1.85.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 38ms 0.5ms 2.1MB 120ms 0ms rustc 1.85.1
rust 5-m.rs 54ms 1.6ms 2.0MB 177ms 0ms rustc 1.85.1
rust 2-im.rs 61ms 0.7ms 2.0MB 200ms 0ms rustc 1.85.1
rust 1-m.rs 90ms 1.9ms 2.1MB 313ms 0ms rustc 1.85.1
rust 3-i.rs 126ms 0.9ms 1.9MB 120ms 0ms rustc 1.85.1
rust 2-i.rs 149ms 0.7ms 1.8MB 140ms 0ms rustc 1.85.1
swift 1.swift 214ms 1.8ms 6.3MB 207ms 0ms swift 6.0.3
rust 1.rs 227ms 1.5ms 1.8MB 217ms 0ms rustc 1.85.1

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5c-m.rs 91ms 0.5ms 3.2MB 260ms 3ms rustc 1.85.1
rust 5-m.rs 95ms 0.4ms 3.2MB 297ms 0ms rustc 1.85.1
swift 3-m.swift 135ms 1.1ms 20.9MB 387ms 0ms swift 6.0.3
rust 1c.rs 162ms 1.0ms 1.9MB 153ms 0ms rustc 1.85.1
rust 1.rs 196ms 1.0ms 1.9MB 187ms 0ms rustc 1.85.1

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5c-m.rs 16ms 0.5ms 3.2MB 27ms 0ms rustc 1.85.1
rust 5-m.rs 16ms 0.9ms 3.2MB 27ms 0ms rustc 1.85.1
rust 1c.rs 19ms 0.3ms 1.9MB 10ms 0ms rustc 1.85.1
rust 1.rs 22ms 0.7ms 2.0MB 10ms 0ms rustc 1.85.1
swift 3.swift 36ms 0.3ms 18.3MB 30ms 0ms swift 6.0.3

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1.2ms 0.1ms 1.8MB 0ms 0ms rustc 1.85.1
rust 1.rs 1.4ms 0.2ms 1.9MB 0ms 0ms rustc 1.87.0-nightly
swift 1.swift 2.5ms 0.2ms 5.9MB 0ms 0ms swift 6.0.3

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 219ms 7.0ms 27.3MB 653ms 10ms rustc 1.85.1
rust 8.rs 485ms 15ms 22.3MB 467ms 7ms rustc 1.85.1
swift 2-m.swift 1390ms 6.6ms 74.5MB 5083ms 30ms swift 6.0.3

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 30ms 2.2ms 16.0MB 63ms 0ms rustc 1.85.1
rust 8.rs 59ms 1.1ms 11.6MB 50ms 0ms rustc 1.85.1
swift 2-m.swift 263ms 1.7ms 60.0MB 693ms 23ms swift 6.0.3

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 168ms 2.2ms 1.9MB 160ms 0ms rustc 1.85.1
rust 7-i.rs 238ms 0.9ms 1.9MB 230ms 0ms rustc 1.85.1
rust 1.rs 240ms 0.8ms 1.8MB 230ms 0ms rustc 1.85.1
rust 3.rs 280ms 0.4ms 1.8MB 270ms 0ms rustc 1.87.0-nightly
rust 2.rs 288ms 8.0ms 1.6MB 277ms 0ms rustc 1.85.1
swift 7.swift 345ms 1.2ms 9.8MB 340ms 0ms swift 6.0.3

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 19ms 0.3ms 1.8MB 10ms 0ms rustc 1.85.1
rust 7-i.rs 26ms 0.2ms 1.8MB 20ms 0ms rustc 1.85.1
rust 1.rs 26ms 0.3ms 1.9MB 20ms 0ms rustc 1.85.1
rust 3.rs 30ms 0.1ms 1.8MB 20ms 0ms rustc 1.87.0-nightly
rust 2.rs 30ms 0.7ms 1.8MB 20ms 0ms rustc 1.85.1
swift 7.swift 40ms 0.2ms 9.8MB 30ms 0ms swift 6.0.3

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1529ms 3.0ms 2.7MB 1307ms 203ms rustc 1.85.1
rust 2.rs 1714ms 6.0ms 2.7MB 1623ms 80ms rustc 1.85.1
swift 1.swift timeout 0.0ms 7.1MB 4910ms 70ms swift 6.0.3

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 324ms 4.0ms 2.4MB 297ms 10ms rustc 1.85.1
rust 2.rs 382ms 2.4ms 2.4MB 370ms 0ms rustc 1.85.1
swift 1.swift 1877ms 8.7ms 7.0MB 1863ms 0ms swift 6.0.3