Fix all regressions relative to v1.1#116
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curiousleo merged 2 commits intointerface-to-performancefrom Apr 29, 2020
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Fix all regressions relative to v1.1#116curiousleo merged 2 commits intointerface-to-performancefrom
curiousleo merged 2 commits intointerface-to-performancefrom
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Note that I tried to keep this PR minimal and only apply changes that had a significant impact in the benchmarks. That means, for example, that I didn't copy over the |
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lehins
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* Make bitmask-with-rejection non-recursive * INLINE some uniformRM implementations
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* Make bitmask-with-rejection non-recursive * INLINE some uniformRM implementations
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* Make bitmask-with-rejection non-recursive * INLINE some uniformRM implementations
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* Make bitmask-with-rejection non-recursive * INLINE some uniformRM implementations
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Jan 6, 2025
…hortbytestring Improve uniform `ShortByteString`
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This combines changes to the bitmask-rejection methods from #103 with a few benchmark-driven
INLINEpragmas.Context
In
interface-to-performanceright now, there are performance regressions relative to v1.1:This PR: no more regressions relative to v1.1
This PR speeds up the slower generators such that every benchmarked function runs faster than on v1.1 by 1400% or more.
Comparison between v1.1 (reference) and this branch:
Some regressions relative to
interface-to-performanceStrangely, while speeding up many generator functions significantly, this PR introduces some mild regressions relative to
interface-to-performance.Comparison between
interface-to-performance(reference) and this branch:As an additional observation, adding one more
INLINE, e.g. for Int8'suniformRM, actually makesnextWord32andnextWord64slower! My guess is that GHC has some sort of "inlining budget", and that adding anotherINLINEpragma somewhere leads to less inlining elsewhere. For this reason I've only addedINLINEpragmas where they improved the benchmark results significantly, and removed them if they led to slower generated code.Conclusion
While I can't fully explain the non-local effects I observed with respect to inlining, this PR does objectively remove all regression we previously had relative to v1.1, so I suggest we merge.