This patch optimizes String.format expressions that uses trivial specifiers. In
the JDK, the most common variation of String.format is a variation of
format("foo: %s", s), which gets a significant speed-up from this.
Various other cleanups and minor improvements reduce overhead further and
ensure we get a small gain also for more complex format strings.
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Commit messages:
- Fix boundary condition
- Add complex pattern micro
- Harmonize micro to generate same length strings and mix trivial and
non-trivial specifiers
- Accidentally mutating Flags.NONE
- Merge branch 'master' into format_opt
- Fixes, cleanups, improvements
- Consolidate slow path
- Fix various edge cases
- Improve Formatter for simple patterns
Changes: https://git.openjdk.java.net/jdk/pull/2830/files
Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2830&range=00
Issue: https://bugs.openjdk.java.net/browse/JDK-8263038
Stats: 265 lines in 2 files changed: 121 ins; 58 del; 86 mod
Patch: https://git.openjdk.java.net/jdk/pull/2830.diff
Fetch: git fetch https://git.openjdk.java.net/jdk pull/2830/head:pull/2830
PR: https://git.openjdk.java.net/jdk/pull/2830
