YJIT Benchmarks

Details for Benchmarks at 2025-08-16 03:53:42 UTC

YJIT metrics from the yjit-bench suite using Ruby 87c4ebd001.

Using the geomean of the headline benchmarks for x86 YJIT 3.5.0dev is
  • 87.2% faster than CRuby 3.5.0dev
  • 4.7% faster than YJIT 3.3.6
On railsbench it is
  • 98.7% faster than CRuby 3.5.0dev
  • 5.2% faster than YJIT 3.3.6
x86_64 runtime: 4 hours, 29 minutes
aarch64 runtime: 3 hours, 49 minutes

Performance on Headline Benchmarks

Speed of each Ruby implementation relative to the baseline CRuby measurement. Higher is better.

Memory Usage on Headline Benchmarks

Memory usage of each Ruby implementation relative to the baseline CRuby measurement. Lower is better.

Performance on Other Benchmarks

Speed of each Ruby implementation relative to the baseline CRuby measurement. Higher is better.

Memory Usage on Other Benchmarks

Memory usage of each Ruby implementation relative to the baseline CRuby measurement. Lower is better.

Performance on MicroBenchmarks

Speed of each Ruby implementation relative to the baseline CRuby measurement. Higher is better.

Memory Usage on MicroBenchmarks

Memory usage of each Ruby implementation relative to the baseline CRuby measurement. Lower is better.

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Benchmarks Speed Details

Benchmark Memory Usage Details

Number of Iterations and Warmups Tested

bench CRuby 3.3.6 warmups CRuby 3.3.6 iters CRuby 3.5.0dev warmups CRuby 3.5.0dev iters YJIT 3.3.6 warmups YJIT 3.3.6 iters YJIT 3.5.0dev warmups YJIT 3.5.0dev iters
activerecord 5 82 5 83 50 155 50 165
chunky-png 5 31 5 32 50 14 50 26
erubi-rails 5 16 5 15 50 10 50 10
hexapdf 5 10 5 10 50 10 50 10
liquid-c 5 420 5 416 50 595 50 534
liquid-compile 5 406 5 472 50 539 50 716
liquid-render 5 172 5 168 50 412 50 383
lobsters 5 20 5 19 50 10 50 10
mail 5 195 5 176 50 250 50 197
psych-load 5 10 5 10 50 10 50 10
railsbench 5 10 5 10 50 10 50 10
rubocop 5 136 5 141 50 201 50 216
ruby-lsp 5 140 5 145 50 223 50 245
sequel 5 431 5 430 50 597 50 589
shipit 5 10 5 10 50 10 50 10
binarytrees 5 84 5 80 50 146 50 117
blurhash 5 82 5 86 50 127 50 145
erubi 5 117 5 138 50 87 50 140
etanni 5 90 5 97 50 53 50 68
fannkuchredux 5 51 5 57 50 97 50 82
fluentd 5 62 5 60 50 24 50 27
graphql 5 336 5 453 50 457 50 913
graphql-native 5 52 5 80 50 14 50 59
lee 5 22 5 22 50 10 50 10
matmul 5 51 5 49 50 88 50 89
nbody 5 249 5 233 50 585 50 702
nqueens 5 120 5 126 50 74 50 549
optcarrot 5 10 5 10 50 10 50 10
protoboeuf 5 179 5 183 50 621 50 689
protoboeuf-encode 5 179 5 197 50 329 50 793
rack 5 416 5 442 50 642 50 691
ruby-json 5 84 5 83 50 50 50 49
rubyboy 5 10 5 10 50 10 50 10
rubykon 5 21 5 21 50 10 50 10
sudoku 5 47 5 51 50 163 50 149
tinygql 5 40 5 43 50 40 50 49
30k_ifelse 5 28 5 27 50 215 50 184
30k_methods 5 39 5 38 50 480 50 472
attr_accessor 5 157 5 180 50 1720 50 1872
cfunc_itself 5 358 5 352 50 1137 50 1258
fib 5 127 5 144 50 902 50 931
getivar 5 213 5 313 50 2251 50 2398
keyword_args 5 94 5 105 50 1034 50 1240
loops-times 5 24 5 25 50 48 50 55
object-new 5 318 5 300 50 405 50 431
respond_to 5 134 5 138 50 3256 50 3901
ruby-xor 5 245 5 237 50 799 50 1281
setivar 5 361 5 345 50 3165 50 4917
setivar_object 5 353 5 308 50 671 50 599
setivar_young 5 367 5 311 50 703 50 642
str_concat 5 396 5 447 50 980 50 1200
throw 5 1270 5 1135 50 1735 50 1406

Different Ruby configurations want different amounts of warmup. With no JIT, CRuby needs hardly any. YJIT warms up fairly quickly, while some JITs may start slower as they do more advanced compilation.

Benchmark YJIT Stats

Hover your cursor over the benchmark names for descriptions of each benchmark.

bench Exit Report Inline Outlined Comp iSeqs Comp Blocks Inval Inval Ratio Bind Alloc Bind Set Const Bumps Compile Time MS
activerecord (click) 1501853 1307093 206 2590 0 0% 0 0 74.809625
chunky-png (click) 314076 287636 74 1322 1 0% 0 0 38.732385
erubi-rails (click) 1893428 1657250 262 3731 22 0% 0 0 104.842066
hexapdf (click) 1509321 1271450 593 15652 43 0% 0 0 451.895866
liquid-c (click) 538162 448968 114 2217 5 0% 0 0 62.135845
liquid-compile (click) 454802 402067 146 2712 2 0% 0 0 80.564782
liquid-render (click) 644577 605476 131 2933 8 0% 0 0 80.82476
lobsters (click) 8540783 7156274 3163 63795 119 0% 0 0 2155.912336
mail (click) 829292 775842 342 7227 40 0% 0 0 207.292831
psych-load (click) 269747 243663 61 830 2 0% 0 0 25.268331
railsbench (click) 3338252 2834464 1649 20199 58 0% 0 0 610.927978
rubocop (click) 6110223 5361922 3011 63546 155 0% 6 0 1850.975148
ruby-lsp (click) 953534 821827 345 6770 44 0% 1 0 187.771856
sequel (click) 492376 416256 11 119 0 0% 0 0 4.002806
shipit (click) 7692928 6385410 3370 53977 209 0% 0 0 1767.275002
binarytrees (click) 7273 6911 6 64 0 0% 0 0 2.614147
blurhash (click) 52295 51444 27 603 0 0% 0 0 17.931359
erubi (click) 232680 206769 5 125 0 0% 0 0 3.933103
etanni (click) 30806 32125 8 108 0 0% 0 0 3.52031
fannkuchredux (click) 24746 40953 3 399 0 0% 0 0 11.147845
fluentd (click) 464668 376470 7 115 0 0% 0 0 3.756533
graphql (click) 392771 339737 73 1919 19 0% 0 0 55.80163
graphql-native (click) 343451 321539 39 532 0 0% 0 0 14.13727
lee (click) 300758 292142 49 1070 0 0% 0 0 31.657476
matmul (click) 11125 4603 8 132 0 0% 0 0 4.153418
nbody (click) 13890 20235 6 238 0 0% 0 0 5.82658
nqueens (click) 22652 36960 5 387 0 0% 0 0 10.335994
optcarrot (click) 325946 290644 188 4740 34 0% 0 0 111.151358
protoboeuf (click) 170160 177773 12 2836 0 0% 0 0 76.068781
protoboeuf-encode (click) 243046 283791 14 1815 0 0% 0 0 46.220992
rack (click) 272055 236820 35 580 0 0% 0 0 15.58964
ruby-json (click) 19782 17637 8 204 0 0% 0 0 5.757996
rubyboy (click) 686280 583780 154 6858 42 0% 0 0 172.766912
rubykon (click) 148508 140471 137 2101 3 0% 0 0 57.446811
sudoku (click) 52157 66291 7 871 0 0% 0 0 23.752378
tinygql (click) 297555 291810 59 1031 5 0% 0 0 28.084338
30k_ifelse (click) 6219958 5057296 9259 75432 0 0% 0 0 1953.093112
30k_methods (click) 2234566 1592952 5778 19357 0 0% 0 0 480.05685
attr_accessor (click) 4372 7952 3 78 0 0% 0 0 2.117534
cfunc_itself (click) 5127 4155 4 53 0 0% 0 0 1.450586
fib (click) 2659 2995 3 30 0 0% 0 0 1.035759
getivar (click) 3812 6802 3 78 0 0% 0 0 1.856624
keyword_args (click) 6332 4965 5 56 0 0% 0 0 1.763589
loops-times (click) 6972 8013 5 93 0 0% 0 0 2.732984
object-new (click) 2406 2818 2 36 0 0% 0 0 1.110116
respond_to (click) 6451 6819 4 80 0 0% 0 0 2.112748
ruby-xor (click) 5876 8690 4 100 0 0% 0 0 2.704204
setivar (click) 2783 3726 3 46 0 0% 0 0 1.254744
setivar_object (click) 3402 3956 3 49 0 0% 0 0 1.405207
setivar_young (click) 4300 4867 4 63 0 0% 0 0 1.702241
str_concat (click) 5799 6969 6 82 0 0% 0 0 2.475458
throw (click) 5953 4624 5 53 0 0% 0 0 1.861238

YJIT stats correspond to the YJIT stats exit report.

Note: currently, all stats are collected on x86_64, not ARM.

Raw JSON data files

All graphs and table data in this page comes from processing these data files, which come from benchmark runs.