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Optimize exivar access on JIT-ed getivar

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JIT support of dd723771c1.

$ benchmark-driver -v --rbenv 'before;before --jit;after --jit' benchmark/mjit_exivar.yml --repeat-count=4
before: ruby 2.8.0dev (2020-03-30T12:32:26Z master e5db3da9d3) [x86_64-linux]
before --jit: ruby 2.8.0dev (2020-03-30T12:32:26Z master e5db3da9d3) +JIT [x86_64-linux]
after --jit: ruby 2.8.0dev (2020-03-31T05:57:24Z mjit-exivar 128625baec) +JIT [x86_64-linux]
Calculating -------------------------------------
                         before  before --jit  after --jit
         mjit_exivar    57.944M       53.579M      54.471M i/s -    200.000M times in 3.451588s 3.732772s 3.671687s

Comparison:
                      mjit_exivar
              before:  57944345.1 i/s
         after --jit:  54470876.7 i/s - 1.06x  slower
        before --jit:  53579483.4 i/s - 1.08x  slower
This commit is contained in:
Takashi Kokubun 2020-03-30 22:27:01 -07:00
parent e5db3da9d3
commit b736ea63bd
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7 changed files with 107 additions and 12 deletions
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32
benchmark/mjit_exivar.yml Normal file
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@ -0,0 +1,32 @@
prelude: |
# frozen_string_literal: true
class Bench < Hash
def initialize
@exivar = nil
end
def exivar
@exivar
end
end
bench = Bench.new
if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
jit_min_calls = 10000
i = 0
while i < jit_min_calls
bench.exivar
i += 1
end
RubyVM::MJIT.pause # compile (1)
# issue recompile
bench.exivar
RubyVM::MJIT.resume
RubyVM::MJIT.pause # compile (2)
end
benchmark:
mjit_exivar: bench.exivar
loop_count: 200000000