On Sat, 23 Aug 2025 04:06:13 GMT, Shaojin Wen <s...@openjdk.org> wrote:
> This PR introduces a new efficient API for appending two-digit integers to > StringBuilders and refactors DateTimeHelper to leverage this new > functionality. > > Changes include: > > 1. New `appendPair` method for efficient two-digit integer formatting (00-99): > - Added `AbstractStringBuilder.appendPair(int i)` with core implementation > - Added `JavaLangAccess.appendPair(StringBuilder, int)` for internal access > - Added `System.JavaLangAccessImpl.appendPair(StringBuilder, int)` bridge > - Added `DecimalDigits.appendPair(StringBuilder, int)` public static > utility method > - Enhanced Javadoc documentation for all new methods > > 2. Refactored `DateTimeHelper` to use the new `DecimalDigits.appendPair`: > - Updated `DateTimeHelper.formatTo` methods for `LocalDate` and `LocalTime` > - Replaced manual formatting logic with the new efficient two-digit > appending > - Improved code clarity and consistency in date/time formatting > > These changes improve code clarity and performance when formatting two-digit > numbers, particularly in date/time formatting scenarios. Generally, even with the performance benefits, this code is too narrow a use case to justify the hacking into AbstractStringBuilder and adding another package busting JavaLangAccess entry point. ------------- PR Comment: https://git.openjdk.org/jdk/pull/26911#issuecomment-3229191148
