On Thu, 22 Jan 2026 01:31:27 GMT, Shaojin Wen <[email protected]> wrote:
>> This is an optimization for decimal Integer.parseInt and Long.parseLong, >> which improves performance by about 10%. The optimization includes: >> 1. Improve performance by parsing 2 numbers at a time, which has performance >> improvements for numbers with length >= 3. >> 2. It uses charAt(0) for the first number. Assuming that the optimization >> can eliminate boundary checks, this will be more friendly to parsing numbers >> with length 1. >> 3. It removes the reliance on the Character.digit method and eliminates the >> reliance on the CharacterDataLatin1#DIGITS cache array, which avoids >> performance degradation caused by cache misses. > > Shaojin Wen has updated the pull request with a new target base due to a > merge or a rebase. The pull request now contains 44 commits: > > - Merge branch 'master' into optim_parse_int_long_202501 > - remove unsafe > - Merge remote-tracking branch 'upstream/master' into > optim_parse_int_long_202501 > - Merge remote-tracking branch 'origin/optim_parse_int_long_202501' into > optim_parse_int_long_202501 > - Merge remote-tracking branch 'upstream/master' into > optim_parse_int_long_202501 > > # Conflicts: > # src/java.base/share/classes/java/lang/Integer.java > # src/java.base/share/classes/java/lang/Long.java > - Merge remote-tracking branch 'upstream/master' into > optim_parse_int_long_202501 > - Merge remote-tracking branch 'upstream/master' into > optim_parse_int_long_202501 > > # Conflicts: > # src/java.base/share/classes/java/lang/Integer.java > # src/java.base/share/classes/java/lang/Long.java > - remove ForceInline > - fix comments > - fix comments > - ... and 34 more: https://git.openjdk.org/jdk/compare/a0ac5b34...90778ed9 src/java.base/share/classes/java/lang/Integer.java line 488: > 486: byte[] value; > 487: if (s == null || radix != 10 || (len = (value = > s.value()).length) == 0 || !s.isLatin1()) { > 488: return parseInt0(s, radix); I think you should put radix == 10 optimized code in `parseInt(String)` and redirect `radix == 10` there instead. ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/22919#discussion_r2719080379
