Programming Language and compiler
Benchmarks

D VS Swift benchmarks

Current benchmark data was generated on Tue Apr 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
d 1.d 1784ms 12ms 312.6MB 1750ms 47ms ldc2 1.40.1
swift 1.swift 2622ms 5.7ms 54.0MB 2590ms 20ms swift 6.0.3
d 1.d 2700ms 18ms 314.7MB 2897ms 43ms dmd 2.110.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 163ms 1.3ms 209.9MB 137ms 10ms ldc2 1.40.1
d 1.d 229ms 2.9ms 212.0MB 200ms 20ms dmd 2.110.0
swift 1.swift 241ms 3.1ms 12.0MB 227ms 0ms swift 6.0.3

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d timeout 0.0ms 17.9MB 4967ms 23ms dmd 2.110.0
d 1.d timeout 0.0ms 16.6MB 4967ms 23ms ldc2 1.40.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 1038ms 4.5ms 12.2MB 1017ms 10ms ldc2 1.40.1
d 1.d 1327ms 17ms 14.5MB 1303ms 17ms dmd 2.110.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 2559ms 8.4ms 8.1MB 2547ms 0ms ldc2 1.40.1
d 1.d 2902ms 0.4ms 10.2MB 2890ms 3ms dmd 2.110.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 444ms 1.8ms 8.2MB 430ms 0ms ldc2 1.40.1
d 1.d 527ms 0.9ms 10.5MB 520ms 0ms dmd 2.110.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 375ms 6.2ms 3.0MB 1430ms 0ms ldc2 1.40.1
d 2-im.d 1116ms 3.8ms 3.0MB 4320ms 0ms ldc2 1.40.1
d 1-i.d 1484ms 1.3ms 2.9MB 1473ms 0ms ldc2 1.40.1
swift 1.swift 2470ms 5.4ms 5.6MB 2460ms 0ms swift 6.0.3
d 1.d 3117ms 14ms 2.9MB 3110ms 0ms ldc2 1.40.1
d 2-i.d 3237ms 1.8ms 2.9MB 3227ms 0ms ldc2 1.40.1
d 1.d 3562ms 12ms 4.6MB 3550ms 0ms dmd 2.110.0
d 1-im.d 4472ms 33ms 4.9MB 17553ms 10ms dmd 2.110.0
d 1-i.d timeout 0.0ms 4.5MB 4990ms 0ms dmd 2.110.0
d 2-i.d timeout 0.0ms 4.5MB 4990ms 0ms dmd 2.110.0
d 2-im.d timeout 0.0ms 4.9MB 19697ms 7ms dmd 2.110.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 37ms 0.5ms 3.1MB 110ms 0ms ldc2 1.40.1
d 2-im.d 99ms 0.1ms 3.0MB 350ms 0ms ldc2 1.40.1
d 1-i.d 124ms 0.3ms 2.9MB 117ms 0ms ldc2 1.40.1
swift 1.swift 211ms 0.6ms 5.6MB 200ms 0ms swift 6.0.3
d 1.d 263ms 2.2ms 2.9MB 253ms 0ms ldc2 1.40.1
d 2-i.d 268ms 0.9ms 2.8MB 260ms 0ms ldc2 1.40.1
d 1.d 299ms 0.4ms 4.6MB 290ms 0ms dmd 2.110.0
d 1-im.d 378ms 1.1ms 5.0MB 1437ms 0ms dmd 2.110.0
d 2-im.d 524ms 1.1ms 5.0MB 2000ms 3ms dmd 2.110.0
d 1-i.d 867ms 10ms 4.5MB 853ms 0ms dmd 2.110.0
d 2-i.d 1368ms 16ms 4.6MB 1360ms 0ms dmd 2.110.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3-m.swift 135ms 0.5ms 20.7MB 387ms 0ms swift 6.0.3
d 1.d 193ms 0.5ms 49.1MB 180ms 3ms ldc2 1.40.1
d 1.d 623ms 1.5ms 53.2MB 613ms 0ms dmd 2.110.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 24ms 0.4ms 11.0MB 13ms 0ms ldc2 1.40.1
swift 3.swift 36ms 0.7ms 18.2MB 30ms 0ms swift 6.0.3
d 1.d 67ms 1.5ms 13.3MB 60ms 0ms dmd 2.110.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 1.7ms 0.2ms 3.0MB 0ms 0ms ldc2 1.40.1
d 1.d 2.3ms 0.2ms 5.0MB 0ms 0ms dmd 2.110.0
swift 1.swift 2.5ms 0.3ms 5.9MB 0ms 0ms swift 6.0.3

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 58ms 1.2ms 15.7MB 67ms 0ms ldc2 1.40.1
d 2.d 237ms 1.4ms 22.5MB 240ms 10ms dmd 2.110.0

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 475ms 18ms 142.0MB 447ms 23ms ldc2 1.40.1
d 2.d 2457ms 11ms 159.0MB 2467ms 33ms dmd 2.110.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-m.d 743ms 22ms 47.2MB 2477ms 10ms ldc2 1.40.1
swift 2-m.swift 1615ms 163ms 74.5MB 5223ms 30ms swift 6.0.3
d 1-m.d 1908ms 47ms 49.5MB 5890ms 13ms dmd 2.110.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-m.d 95ms 16ms 39.8MB 263ms 13ms ldc2 1.40.1
d 1-m.d 204ms 5.0ms 42.0MB 630ms 7ms dmd 2.110.0
swift 2-m.swift 259ms 0.7ms 59.9MB 673ms 27ms swift 6.0.3

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 130ms 0.9ms 6.1MB 120ms 0ms ldc2 1.40.1
d 1.d 178ms 1.6ms 8.1MB 167ms 0ms dmd 2.110.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 376ms 1.9ms 6.1MB 363ms 13ms ldc2 1.40.1
d 1.d 517ms 0.7ms 7.9MB 507ms 20ms dmd 2.110.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 57ms 0.9ms 5.9MB 50ms 0ms ldc2 1.40.1
d 1.d 80ms 1.4ms 8.2MB 70ms 0ms dmd 2.110.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 295ms 1.3ms 7.0MB 283ms 0ms ldc2 1.40.1
d 1.d 2396ms 387ms 8.8MB 2387ms 0ms dmd 2.110.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 15ms 0.1ms 3.0MB 10ms 0ms ldc2 1.40.1
d 1.d 97ms 3.2ms 4.6MB 90ms 0ms dmd 2.110.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 987ms 6.0ms 312.7MB 953ms 40ms ldc2 1.40.1
d 1.d 1748ms 11ms 314.7MB 1867ms 50ms dmd 2.110.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 198ms 3.5ms 312.6MB 160ms 27ms ldc2 1.40.1
d 1.d 339ms 2.9ms 314.9MB 307ms 27ms dmd 2.110.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 347ms 2.5ms 9.8MB 337ms 0ms swift 6.0.3
d 2.d 361ms 0.6ms 2.9MB 350ms 0ms ldc2 1.40.1
d 1.d 362ms 1.0ms 2.9MB 350ms 0ms ldc2 1.40.1
d 1.d 686ms 4.3ms 4.6MB 677ms 0ms dmd 2.110.0
d 2.d 2031ms 8.1ms 4.6MB 2023ms 0ms dmd 2.110.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 39ms 0.3ms 2.9MB 30ms 0ms ldc2 1.40.1
d 1.d 40ms 0.3ms 2.9MB 30ms 0ms ldc2 1.40.1
swift 7.swift 41ms 1.3ms 9.8MB 30ms 0ms swift 6.0.3
d 1.d 71ms 0.7ms 4.6MB 60ms 0ms dmd 2.110.0
d 2.d 207ms 1.6ms 4.6MB 200ms 0ms dmd 2.110.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 368ms 4.0ms 77.4MB 353ms 0ms dmd 2.110.0
d 1.d 385ms 5.5ms 42.9MB 367ms 3ms ldc2 1.40.1
d 2.d 844ms 3.3ms 49.1MB 830ms 7ms ldc2 1.40.1
d 2.d 1185ms 23ms 48.7MB 1173ms 0ms dmd 2.110.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 61ms 0.8ms 15.0MB 50ms 0ms ldc2 1.40.1
d 1.d 76ms 1.0ms 27.1MB 70ms 0ms dmd 2.110.0
d 2.d 209ms 0.4ms 17.0MB 197ms 0ms ldc2 1.40.1
d 2.d 292ms 3.7ms 18.9MB 280ms 0ms dmd 2.110.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 2449ms 25ms 8.1MB 2400ms 413ms ldc2 1.40.1
d 1.d 4318ms 7.0ms 10.1MB 4247ms 483ms dmd 2.110.0
swift 1.swift timeout 0.0ms 7.1MB 4927ms 60ms swift 6.0.3

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 588ms 6.2ms 8.0MB 580ms 90ms ldc2 1.40.1
d 1.d 1037ms 9.5ms 10.3MB 1007ms 117ms dmd 2.110.0
swift 1.swift 1870ms 12ms 7.0MB 1853ms 0ms swift 6.0.3

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 3.d 578ms 7.1ms 169.8MB 760ms 17ms ldc2 1.40.1
d 3.d 1283ms 1.6ms 176.7MB 1477ms 17ms dmd 2.110.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 3.d 63ms 1.4ms 25.1MB 70ms 0ms ldc2 1.40.1
d 3.d 136ms 2.4ms 30.4MB 147ms 0ms dmd 2.110.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 4822ms 90ms 4.0MB 4747ms 393ms ldc2 1.40.1
d 1.d timeout 0.0ms 6.5MB 4963ms 280ms dmd 2.110.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 1207ms 13ms 4.0MB 1200ms 77ms ldc2 1.40.1
d 1.d 2080ms 41ms 6.9MB 2047ms 127ms dmd 2.110.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 3596ms 8.1ms 3.8MB 3583ms 0ms ldc2 1.40.1
d 1.d 3674ms 49ms 6.0MB 3667ms 0ms dmd 2.110.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 902ms 2.0ms 3.4MB 890ms 0ms ldc2 1.40.1
d 1.d 923ms 9.6ms 7.7MB 910ms 0ms dmd 2.110.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 229ms 1.5ms 3.1MB 220ms 0ms ldc2 1.40.1
d 1.d 236ms 0.3ms 4.9MB 227ms 0ms dmd 2.110.0