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to eliminate sp / pc moves by cancelling JIT execution on interrupts.
$ benchmark-driver benchmark.yml -v --rbenv 'before --jit;after --jit' --repeat-count=12 --output=all
before --jit: ruby 2.8.0dev (2020-04-01T03:48:56Z master 5a81562dfe) +JIT [x86_64-linux]
after --jit: ruby 2.8.0dev (2020-04-01T04:58:01Z master 39beb26a27) +JIT [x86_64-linux]
Calculating -------------------------------------
before --jit after --jit
Optcarrot Lan_Master.nes 75.06409603894944 76.06422026555558 fps
75.12025067279242 78.48161731616810
77.42020273492177 79.78958240950033
79.07253675128945 79.88645902325614
79.99179109732327 80.33743931749331
80.07633091008627 80.53790081529166
80.15450942667547 80.99048270668010
80.48372803283709 81.70497146081003
80.57410149187352 82.79494539467382
81.80449157081202 82.85797792223954
82.24629397834902 83.00603891515506
82.63708148686703 83.23221006969828
$ benchmark-driver -v --rbenv 'before;before --jit;after --jit' benchmark/mjit_leave.yml --repeat-count=4
before: ruby 2.8.0dev (2020-04-01T03:48:56Z master 5a81562dfe) [x86_64-linux]
before --jit: ruby 2.8.0dev (2020-04-01T03:48:56Z master 5a81562dfe) +JIT [x86_64-linux]
after --jit: ruby 2.8.0dev (2020-04-01T04:58:01Z master 39beb26a27) +JIT [x86_64-linux]
Calculating -------------------------------------
before before --jit after --jit
mjit_leave 106.656M 82.786M 91.635M i/s - 200.000M times in 1.875183s 2.415881s 2.182569s
Comparison:
mjit_leave
before: 106656239.9 i/s
after --jit: 91635143.7 i/s - 1.16x slower
before --jit: 82785537.2 i/s - 1.29x slower
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