YJIT Benchmarks

Details for Benchmarks at 2021-10-15 07:10:10 GMT

YJIT metrics from the yjit-bench suite

Overall YJIT is 29.8% faster than interpreted CRuby!
On Railsbench specifically, YJIT is 22.0% faster than CRuby!

Performance on Headline Benchmarks

0.0 0.2 0.4 0.6 0.8 1.0 1.2 No JIT MJIT3.0 YJIT activerecord hexapdf liquid-render mail psych-load railsbench
Speed of each Ruby implementation relative to the baseline CRuby measurement. Higher is better.

Memory Usage on Headline Benchmarks

0.0 2.0 4.0 6.0 8.0 CRuby 3.1.0dev MJIT3.0 YJIT 3.1.0dev activerecord hexapdf liquid-render mail psych-load railsbench geomean*
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

0.0 2.0 4.0 6.0 8.0 10.0 12.0 CRuby 3.1.0dev MJIT3.0 YJIT 3.1.0dev binarytrees fannkuchredux jekyll lee nbody optcarrot geomean*
Memory usage of each Ruby implementation relative to the baseline CRuby measurement. Lower is better.

Performance on MicroBenchmarks

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 No JIT MJIT3.0 YJIT 30k_ifelse 30k_methods cfunc_itself fib getivar keyword_args respond_to setivar
Speed of each Ruby implementation relative to the baseline CRuby measurement. Higher is better.

Memory Usage on MicroBenchmarks

0.0 2.0 4.0 6.0 8.0 10.0 12.0 CRuby 3.1.0dev MJIT3.0 YJIT 3.1.0dev 30k_ifelse 30k_methods cfunc_itself fib getivar keyword_args respond_to setivar geomean*
Memory usage of each Ruby implementation relative to the baseline CRuby measurement. Lower is better.

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Benchmarks Speed Details

bench No JIT (ms) No JIT RSD MJIT3.0 (ms) MJIT3.0 RSD YJIT (ms) YJIT RSD MJIT3.0 spd MJIT3.0 spd RSD YJIT spd YJIT spd RSD % in YJIT
activerecord 145.7 1.27% 154.5 0.86% 107.3 0.45% 0.94x 1.53% 1.36x 1.34% 80.96%
hexapdf 2847.4 0.76% 2740.1 2.09% 2184.0 1.54% 1.04x 2.22% 1.30x 1.72% 72.00%
liquid-render 174.0 1.24% 161.3 2.12% 124.4 2.02% 1.08x 2.46% 1.40x 2.37% 71.70%
mail 157.4 0.15% 147.6 0.38% 139.3 0.36% 1.07x 0.41% 1.13x 0.39% 98.31%
psych-load 2232.8 0.19% 1886.2 2.67% 1597.4 0.10% 1.18x 2.67% 1.40x 0.22% 82.02%
railsbench 2921.0 1.13% 3016.7 1.20% 2394.1 1.89% 0.97x 1.65% 1.22x 2.21% 79.87%
binarytrees 367.7 0.06% 264.0 0.64% 293.3 2.66% 1.39x 0.64% 1.25x 2.66% 84.27%
fannkuchredux 5461.1 0.23% 3988.5 0.28% 5568.0 0.04% 1.37x 0.36% 0.98x 0.24% 0.02%
jekyll 8383.6 1.58% 8273.0 1.40% 7466.4 1.89% 1.01x 2.11% 1.12x 2.47% 78.42%
lee 1100.6 0.74% 869.2 1.19% 783.3 1.03% 1.27x 1.40% 1.41x 1.27% 99.92%
nbody 108.9 0.31% 58.9 0.62% 75.5 0.06% 1.85x 0.69% 1.44x 0.31% 100.00%
optcarrot 4968.8 0.56% 4246.3 0.76% 3146.5 0.47% 1.17x 0.95% 1.58x 0.73% 96.13%
30k_ifelse 2317.0 0.13% 2221.6 3.32% 331.0 0.17% 1.04x 3.32% 7.00x 0.21% 99.99%
30k_methods 6031.9 0.04% 5836.7 0.09% 758.1 0.03% 1.03x 0.10% 7.96x 0.05% 100.00%
cfunc_itself 89.7 0.16% 57.2 0.20% 39.0 0.26% 1.57x 0.25% 2.30x 0.30% 100.00%
fib 192.8 0.04% 62.5 0.03% 52.0 0.06% 3.08x 0.05% 3.71x 0.07% 100.00%
getivar 86.6 0.10% 97.3 0.10% 36.3 0.03% 0.89x 0.14% 2.39x 0.10% 86.63%
keyword_args 241.0 0.03% 189.1 0.04% 46.1 0.33% 1.27x 0.05% 5.23x 0.33% 100.00%
respond_to 229.2 0.29% 200.7 0.52% 164.1 0.33% 1.14x 0.59% 1.40x 0.44% 100.00%
setivar 70.9 0.04% 73.0 0.10% 42.2 0.04% 0.97x 0.11% 1.68x 0.06% 88.40%

RSD is relative standard deviation - the standard deviation divided by the mean, expressed as a percentage.
% in YJIT is the percentage of instructions that complete in YJIT rather than exiting to the non-JITted interpreter. YJIT performs better when this is higher.
Speedup is relative to interpreted CRuby. So an "MJIT speedup" of 1.21x means MJIT runs at 1.21 times the iters/second of CRuby with JIT disabled.

You can find our benchmark code in the yjit-bench Github repo and the yjit-extra-benchmarks Github repo.
Our benchmark-runner and reporting code is in the yjit-metrics Github repo.

Tested Ruby version for YJIT and No-JIT: ruby 3.1.0dev (2021-10-14T20:49:33Z main 6b2ff13ba2) +YJIT [x86_64-linux]
Tested Ruby version for Ruby 3.0 MJIT: ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) +JIT [x86_64-linux]

Benchmark Memory Usage Details

Number of Iterations and Warmups Tested

bench No JIT warmups No JIT iters MJIT3.0 warmups MJIT3.0 iters YJIT warmups YJIT iters
activerecord 10 128 10 120 10 177
hexapdf 10 10 10 10 10 10
liquid-render 10 105 10 114 10 151
mail 10 117 10 125 10 133
psych-load 10 10 10 10 10 10
railsbench 10 10 10 10 10 10
binarytrees 10 45 10 66 10 59
fannkuchredux 10 10 10 10 10 10
jekyll 10 10 10 10 10 10
lee 10 10 10 13 10 16
nbody 10 174 10 325 10 255
optcarrot 10 10 10 10 10 10
30k_ifelse 10 10 10 10 10 51
30k_methods 10 10 10 10 10 17
cfunc_itself 10 214 10 339 10 503
fib 10 94 10 308 10 375
getivar 10 221 10 196 10 530
keyword_args 10 74 10 96 10 424
respond_to 10 78 10 90 10 112
setivar 10 273 10 264 10 458

Different Ruby configurations want different amounts of warmup. With no JIT, CRuby needs hardly any. YJIT and MJIT 3.0 both warm up quite quickly, while MJIT in 3.1 often slows down for a time as it compiles, after an unpredictable delay.

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
activerecord (click) 1113370 867117 185 1160 0 0% 0 0 0
hexapdf (click) 975617 816619 602 7877 675 8% 0 0 320
liquid-render (click) 459412 375549 143 1288 94 7% 0 0 1
mail (click) 978778 756639 337 5011 129 2% 0 0 39
psych-load (click) 185002 149179 56 409 1 0% 0 0 0
railsbench (click) 2565041 1998326 1293 9570 262 2% 0 0 26
binarytrees (click) 113533 89826 9 49 0 0% 0 0 0
fannkuchredux (click) 129917 103829 6 203 0 0% 0 0 0
jekyll (click) 1960538 1630556 336 3721 174 4% 0 0 0
lee (click) 234794 181551 85 1091 114 10% 1 0 13
nbody (click) 123261 97934 8 149 0 0% 0 0 0
optcarrot (click) 459837 430104 196 3567 20 0% 0 0 0
30k_ifelse (click) 5561469 4891133 9261 57795 0 0% 0 0 0
30k_methods (click) 2117693 1816572 5780 19352 0 0% 0 0 0
cfunc_itself (click) 111997 88265 6 40 0 0% 0 0 0
fib (click) 109885 87444 6 29 0 0% 0 0 0
getivar (click) 112253 90679 6 56 0 0% 0 0 0
keyword_args (click) 113213 89399 7 42 0 0% 0 0 0
respond_to (click) 114557 90187 6 55 0 0% 0 0 0
setivar (click) 112253 88988 6 29 0 0% 0 0 0

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.