On Sun, 17 Sep 2023 16:01:33 GMT, 温绍锦 <d...@openjdk.org> wrote:
> @cl4es made performance optimizations for the simple specifiers of > String.format in PR https://github.com/openjdk/jdk/pull/2830. Based on the > same idea, I continued to make improvements. I made patterns like %2d %02d > also be optimized. > > The following are the test results based on MacBookPro M1 Pro: > > > -Benchmark Mode Cnt Score Error Units > -StringFormat.complexFormat avgt 15 1862.233 ? 217.479 ns/op > -StringFormat.int02Format avgt 15 312.491 ? 26.021 ns/op > -StringFormat.intFormat avgt 15 84.432 ? 4.145 ns/op > -StringFormat.longFormat avgt 15 87.330 ? 6.111 ns/op > -StringFormat.stringFormat avgt 15 63.985 ? 11.366 ns/op > -StringFormat.stringIntFormat avgt 15 87.422 ? 0.147 ns/op > -StringFormat.widthStringFormat avgt 15 250.740 ? 32.639 ns/op > -StringFormat.widthStringIntFormat avgt 15 312.474 ? 16.309 ns/op > > +Benchmark Mode Cnt Score Error Units > +StringFormat.complexFormat avgt 15 740.626 ? 66.671 ns/op > (+151.45) > +StringFormat.int02Format avgt 15 131.049 ? 0.432 ns/op > (+138.46) > +StringFormat.intFormat avgt 15 67.229 ? 4.155 ns/op > (+25.59) > +StringFormat.longFormat avgt 15 66.444 ? 0.614 ns/op > (+31.44) > +StringFormat.stringFormat avgt 15 62.619 ? 4.652 ns/op (+2.19) > +StringFormat.stringIntFormat avgt 15 89.606 ? 13.966 ns/op (-2.44) > +StringFormat.widthStringFormat avgt 15 52.462 ? 15.649 ns/op > (+377.95) > +StringFormat.widthStringIntFormat avgt 15 101.814 ? 3.147 ns/op > (+206.91) I will delete redundant performance tests later. and I will delete redundant performance tests ,The current results are as follows : # Performance Numbers ## 1. [aliyun_ecs_c8i.xlarge](https://help.aliyun.com/document_detail/25378.html#c8i) * cpu : intel xeon sapphire rapids (x64) * os debian linux -Benchmark Mode Cnt Score Error Units (baseline) -StringFormat.complexFormat avgt 15 1426.696 ? 18.469 ns/op -StringFormat.flags2Format avgt 15 164.141 ? 2.264 ns/op -StringFormat.flagsFormat avgt 15 169.313 ? 6.616 ns/op -StringFormat.stringFormat avgt 15 34.710 ? 0.075 ns/op -StringFormat.stringIntFormat avgt 15 85.152 ? 0.337 ns/op -StringFormat.width2Format avgt 15 242.483 ? 5.586 ns/op -StringFormat.width2PrecisionFormat avgt 15 282.838 ? 2.564 ns/op -StringFormat.widthFormat avgt 15 175.460 ? 4.458 ns/op -StringFormat.widthPrecisionFormat avgt 15 244.593 ? 3.605 ns/op -StringFormat.widthStringFormat avgt 15 144.487 ? 5.271 ns/op -StringFormat.widthStringIntFormat avgt 15 223.913 ? 6.387 ns/op +Benchmark Mode Cnt Score Error Units (59c2983b) +StringFormat.complexFormat avgt 15 582.650 ? 17.399 ns/op (+144.87) +StringFormat.flags2Format avgt 15 74.214 ? 0.703 ns/op (+121.18) +StringFormat.flagsFormat avgt 15 67.764 ? 0.572 ns/op (+149.86) +StringFormat.stringFormat avgt 15 34.659 ? 0.201 ns/op (+0.15) +StringFormat.stringIntFormat avgt 15 84.448 ? 0.532 ns/op (+0.84) +StringFormat.width2Format avgt 15 123.012 ? 0.513 ns/op (+97.13) +StringFormat.width2PrecisionFormat avgt 15 148.092 ? 1.273 ns/op (+90.99) +StringFormat.widthFormat avgt 15 69.575 ? 1.023 ns/op (+152.19) +StringFormat.widthPrecisionFormat avgt 15 116.187 ? 0.938 ns/op (+110.52) +StringFormat.widthStringFormat avgt 15 48.389 ? 0.298 ns/op (+198.60) +StringFormat.widthStringIntFormat avgt 15 103.617 ? 2.204 ns/op (+116.10) ## 2. [aliyun_ecs_c8y.xlarge](https://help.aliyun.com/document_detail/25378.html#c8y) * cpu : aliyun yitian 710 (aarch64) * os debian linux -Benchmark Mode Cnt Score Error Units (baseline) -StringFormat.complexFormat avgt 15 2321.319 ? 9.624 ns/op -StringFormat.flags2Format avgt 15 310.377 ? 10.367 ns/op -StringFormat.flagsFormat avgt 15 295.118 ? 8.645 ns/op -StringFormat.stringFormat avgt 15 55.966 ? 0.949 ns/op -StringFormat.stringIntFormat avgt 15 157.949 ? 2.972 ns/op -StringFormat.width2Format avgt 15 380.621 ? 11.301 ns/op -StringFormat.width2PrecisionFormat avgt 15 447.285 ? 7.323 ns/op -StringFormat.widthFormat avgt 15 312.622 ? 5.104 ns/op -StringFormat.widthPrecisionFormat avgt 15 407.196 ? 6.466 ns/op -StringFormat.widthStringFormat avgt 15 248.538 ? 2.356 ns/op -StringFormat.widthStringIntFormat avgt 15 416.661 ? 6.685 ns/op +Benchmark Mode Cnt Score Error Units (59c2983b) +StringFormat.complexFormat avgt 15 930.922 ? 91.995 ns/op (+149.36) +StringFormat.flags2Format avgt 15 132.746 ? 10.809 ns/op (+133.82) +StringFormat.flagsFormat avgt 15 119.267 ? 11.709 ns/op (+147.45) +StringFormat.stringFormat avgt 15 55.820 ? 0.324 ns/op (+0.27) +StringFormat.stringIntFormat avgt 15 154.045 ? 7.327 ns/op (+2.54) +StringFormat.width2Format avgt 15 177.655 ? 4.797 ns/op (+114.25) +StringFormat.width2PrecisionFormat avgt 15 236.680 ? 4.266 ns/op (+88.99) +StringFormat.widthFormat avgt 15 132.043 ? 15.730 ns/op (+136.76) +StringFormat.widthPrecisionFormat avgt 15 204.085 ? 10.300 ns/op (+99.53) +StringFormat.widthStringFormat avgt 15 106.971 ? 5.527 ns/op (+132.35) +StringFormat.widthStringIntFormat avgt 15 215.329 ? 3.786 ns/op (+93.50) ------------- PR Comment: https://git.openjdk.org/jdk/pull/15776#issuecomment-1731163579
