Adding a fast-path for ASCII-only modified UTF-8 strings deserialied via Data- and ObjectInputStream
Testing: tier1-3 ------------- Commit messages: - Merge branch 'master' into io_utf8_fastpath - Reduce cost for small Strings in DataInputStream - Optimize away StringBuilder for strings smaller than CHAR_BUF_SIZE chars, add more micros, minor improvements - Sync up DataInputStreamTest to make results comparable with ObjectInputStreamTest, fix a buffer overrun issue in ObjectInputStream - Remove stray code - Clean up DataInputStream.readUTF/readUTFChars - Use ISO-8859-1 to avoid back-to-back countPositives scans - Rearrange JLA - Add ASCII fast-path to Data-/ObjectInputStream.readUTF Changes: https://git.openjdk.org/jdk/pull/17734/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17734&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8325340 Stats: 413 lines in 4 files changed: 375 ins; 15 del; 23 mod Patch: https://git.openjdk.org/jdk/pull/17734.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/17734/head:pull/17734 PR: https://git.openjdk.org/jdk/pull/17734
