On Tue, 21 Nov 2023 00:06:19 GMT, Scott Gibbons <sgibb...@openjdk.org> wrote:
> Re-write the IndexOf code without the use of the pcmpestri instruction, only > using AVX2 instructions. This change accelerates String.IndexOf on average > 1.3x for AVX2. The benchmark numbers: > > > Benchmark Score > Latest > StringIndexOf.advancedWithMediumSub 343.573 317.934 > 0.925375393x > StringIndexOf.advancedWithShortSub1 1039.081 1053.96 > 1.014319384x > StringIndexOf.advancedWithShortSub2 55.828 110.541 > 1.980027943x > StringIndexOf.constantPattern 9.361 11.906 > 1.271872663x > StringIndexOf.searchCharLongSuccess 4.216 4.218 > 1.000474383x > StringIndexOf.searchCharMediumSuccess 3.133 3.216 > 1.02649218x > StringIndexOf.searchCharShortSuccess 3.76 3.761 > 1.000265957x > StringIndexOf.success 9.186 9.713 > 1.057369911x > StringIndexOf.successBig 14.341 46.343 > 3.231504079x > StringIndexOfChar.latin1_AVX2_String 6220.918 12154.52 > 1.953814533x > StringIndexOfChar.latin1_AVX2_char 5503.556 5540.044 > 1.006629895x > StringIndexOfChar.latin1_SSE4_String 6978.854 6818.689 > 0.977049957x > StringIndexOfChar.latin1_SSE4_char 5657.499 5474.624 > 0.967675646x > StringIndexOfChar.latin1_Short_String 7132.541 6863.359 > 0.962260014x > StringIndexOfChar.latin1_Short_char 16013.389 16162.437 > 1.009307711x > StringIndexOfChar.latin1_mixed_String 7386.123 14771.622 > 1.999915517x > StringIndexOfChar.latin1_mixed_char 9901.671 9782.245 > 0.987938803 Opening up for review. Fixed last whitespace error. I will post final performance numbers soon. ------------- PR Comment: https://git.openjdk.org/jdk/pull/16753#issuecomment-1831031294
