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March 22, 2018 [Issue 18600] Regex performance enhancement for repeated matchFirst calls | ||||
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https://issues.dlang.org/show_bug.cgi?id=18600 --- Comment #1 from github-bugzilla@puremagic.com --- Commit pushed to master at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/4318073f40ae3e82ac1847da5e037ab2f091d6fc Fix issue 18600 Revamp std.regex caching for matchFirst case -- |
March 22, 2018 [Issue 18600] Regex performance enhancement for repeated matchFirst calls | ||||
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https://issues.dlang.org/show_bug.cgi?id=18600 github-bugzilla@puremagic.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED -- |
May 14, 2018 [Issue 18600] Regex performance enhancement for repeated matchFirst calls | ||||
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https://issues.dlang.org/show_bug.cgi?id=18600 --- Comment #2 from Jon Degenhardt <jrdemail2000-dlang@yahoo.com> --- Phobos PR 6268 was included in LDC 1.10.0-beta1. For this release the standard benchmark I used for the TSV Utilities improved as follows: LDC 1.7.0 (before regression): 8.37 seconds LDC 1.8.0 (after regression): 10.01 seconds LDC 1.9.0 (first fixes): 9.44 seconds LDC 1.10.0-beta1 (Phobos PR 6268): 5.85 seconds First fixes: Phobos PR 5981, DMD PR 7599 The benchmark test used reads a TSV file line-by-line and checks individual fields for regex matches. A significant amount of processing time is IO, so the percentage gain on the regex portion is higher than the overall gain. The overall gain from LDC 1.7.0 is 30%. Test was run on MacOS, MacMini with 16GB RAM, SSD drives. The file used was 2.7GB, 14 million lines. Test info can be found here: https://github.com/eBay/tsv-utils-dlang/blob/master/docs/ComparativeBenchmarks2018.md Great result! -- |
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