Speed up shape transitions #6751
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k0kubun
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Nov 17, 2022
peterzhu2118
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This commit significantly speeds up shape transitions as it changes
get_next_shape_internal to not perform a lookup (and instead require
the caller to perform the lookup). This avoids double lookups during
shape transitions.
There is a significant (~2x) speedup in the following micro-benchmark:
puts(Benchmark.measure do
o = Object.new
100_000.times do |i|
o.instance_variable_set(:"@A#{i}", 0)
end
end)
Before:
22.393194 0.201639 22.594833 ( 22.684237)
After:
11.323086 0.022284 11.345370 ( 11.389346)
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This commit significantly speeds up shape transitions as it changes get_next_shape_internal to not perform a lookup (and instead require the caller to perform the lookup). This avoids double lookups during shape transitions.
There is a significant (~2x) speedup in the following micro-benchmark:
Before:
After: