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[mypyc] Implement str-to-float primitive #9685

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merged 5 commits into from Nov 2, 2020
Merged

[mypyc] Implement str-to-float primitive #9685

merged 5 commits into from Nov 2, 2020

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TH3CHARLie
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related mypyc/mypyc#644

Implement builtins.float conversion from strings.

@TH3CHARLie
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str-to-float microbenchmark results:

before:

interpreted: 0.890635s (avg of 5 iterations; stdev 0.8%)
compiled:    0.823043s (avg of 5 iterations; stdev 0.9%)

compiled is 1.082x faster

after:

interpreted: 0.894912s (avg of 5 iterations; stdev 4.6%)
compiled:    0.348376s (avg of 5 iterations; stdev 3.1%)

compiled is 2.569x faster

JukkaL
JukkaL approved these changes Nov 2, 2020
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A nice perf win!

Can you also add a test case for this? For example, create mypyc/test-data/run-floats.test, or add to mypyc/test-data/run-misc.test?

@TH3CHARLie
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A nice perf win!

Can you also add a test case for this? For example, create mypyc/test-data/run-floats.test, or add to mypyc/test-data/run-misc.test?

Sure, I'll merge this once the testcase is added and CI gets green

@TH3CHARLie TH3CHARLie merged commit 3ed4747 into python:master Nov 2, 2020
@TH3CHARLie TH3CHARLie deleted the str-to-float branch November 2, 2020 20:40
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@JukkaL JukkaL JukkaL approved these changes

@Amir436 Amir436 Amir436 approved these changes

@msullivan msullivan Awaiting requested review from msullivan

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3 participants
@TH3CHARLie @JukkaL @Amir436