> This PR suggests we can speed up `StringLatin1.regionMatchesCI` by applying > 'the oldest ASCII trick in the book'. > > The new static method `CharacterDataLatin1.equalsIgnoreCase` compares two > latin1 bytes for equality ignoring case. `StringLatin1.regionMatchesCI` is > updated to use `equalsIgnoreCase` > > To verify the correctness of `equalsIgnoreCase`, a new test is added to > `EqualsIgnoreCase` with an exhaustive verification that all 256x256 latin1 > code point pairs have an `equalsIgnoreCase` consistent with > Character.toUpperCase, Character.toLowerCase. > > Performance is tested for matching and mismatching cases of code point pairs > picked from the ASCII letter, ASCII number and latin1 letter ranges. Results > in the first comment below.
Eirik Bjorsnos has updated the pull request incrementally with one additional commit since the last revision: Add clarifying comments and use more descriptive variable names in the latin1 verification EqualsIgnoreCase test ------------- Changes: - all: https://git.openjdk.org/jdk/pull/12632/files - new: https://git.openjdk.org/jdk/pull/12632/files/59c42298..84517102 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=12632&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12632&range=01-02 Stats: 16 lines in 1 file changed: 5 ins; 2 del; 9 mod Patch: https://git.openjdk.org/jdk/pull/12632.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12632/head:pull/12632 PR: https://git.openjdk.org/jdk/pull/12632
