On Wed, 4 Jun 2025 18:18:39 GMT, Johannes Graham <d...@openjdk.org> wrote:
> This PR replaces construction of intermediate strings to be parsed with more > direct manipulation of numbers. It also has a more streamlined mechanism of > handling `Long.MIN_VALUE` when parsing longs by using `Long.parseUnsignedLong` > > As a small side-effect it also eliminates the use of a cached StringBuilder > in DigitList. > > Testing: > - GHA > - Local run of tier 2 and jtreg:jdk/java/text > - New benchmark: DecimalFormatParseBench Rough performance results on AArch64 M4: Original Benchmark Mode Cnt Score Error Units -DecimalFormatParseBench.testParseDoubles thrpt 15 15200.984 ± 409.547 ops/ms -DecimalFormatParseBench.testParseLongs thrpt 15 25777.899 ± 559.096 ops/ms This PR Benchmark Mode Cnt Score Error Units +DecimalFormatParseBench.testParseDoubles thrpt 15 28041.325 ± 472.657 ops/ms +DecimalFormatParseBench.testParseLongs thrpt 15 34181.146 ± 655.719 ops/ms ------------- PR Comment: https://git.openjdk.org/jdk/pull/25644#issuecomment-2940975486
