Use fast path for ascii characters 1 to 127 to improve the performance of writing Utf8Entry to BufferWriter.
------------- Commit messages: - bug fix - optimize Utf8EntryImpl#writeTo Changes: https://git.openjdk.org/jdk/pull/20772/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20772&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8339290 Stats: 70 lines in 5 files changed: 32 ins; 1 del; 37 mod Patch: https://git.openjdk.org/jdk/pull/20772.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/20772/head:pull/20772 PR: https://git.openjdk.org/jdk/pull/20772
