Re: RFR: 8288011: StringConcatFactory: Split application of stringifiers [v2]
On Thu, 9 Jun 2022 16:04:43 GMT, Claes Redestad wrote: >> To take optimal advantage of the pre-existing optimization for repeated >> filters we could split the application of different types of stringifiers. >> >> The resulting difference in order of evaluation is not observable by >> conventional means since all reference type share the same object >> stringifier, and the others are filtering primitives (floats and doubles) >> which have been passed by value already. >> >> This change neutral on many concatenation expression shapes, but for any >> complex expressions with interleaving float/double and reference parameters >> it brings a straightforward reduction in rebinds and underlying LFs >> generated. For example on the >> [MixedStringCombinations.java](https://gist.github.com/cl4es/08fb581dece3a73e89bfa52337bc4248) >> test there's a modest 2% reduction in total classes loaded with this change >> (from 16209 to 15872) > > Claes Redestad has updated the pull request incrementally with one additional > commit since the last revision: > > Improve comments based on review feedback Looks good to me. Like Jorne's observation, it'd benefit everyone if this could generate just a single new lambda form multiple filters, not just for repeated filters if feasible. Maybe something to explore more in the future with a tradeoff of complexity. - Marked as reviewed by mchung (Reviewer). PR: https://git.openjdk.org/jdk/pull/9082
Re: RFR: 8288011: StringConcatFactory: Split application of stringifiers [v2]
> To take optimal advantage of the pre-existing optimization for repeated > filters we could split the application of different types of stringifiers. > > The resulting difference in order of evaluation is not observable by > conventional means since all reference type share the same object > stringifier, and the others are filtering primitives (floats and doubles) > which have been passed by value already. > > This change neutral on many concatenation expression shapes, but for any > complex expressions with interleaving float/double and reference parameters > it brings a straightforward reduction in rebinds and underlying LFs > generated. For example on the > [MixedStringCombinations.java](https://gist.github.com/cl4es/08fb581dece3a73e89bfa52337bc4248) > test there's a modest 2% reduction in total classes loaded with this change > (from 16209 to 15872) Claes Redestad has updated the pull request incrementally with one additional commit since the last revision: Improve comments based on review feedback - Changes: - all: https://git.openjdk.org/jdk/pull/9082/files - new: https://git.openjdk.org/jdk/pull/9082/files/51c841e8..4b7c696e Webrevs: - full: https://webrevs.openjdk.java.net/?repo=jdk=9082=01 - incr: https://webrevs.openjdk.java.net/?repo=jdk=9082=00-01 Stats: 11 lines in 1 file changed: 7 ins; 2 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/9082.diff Fetch: git fetch https://git.openjdk.org/jdk pull/9082/head:pull/9082 PR: https://git.openjdk.org/jdk/pull/9082
