By correctly sizing an intermediate `byte[]` and making use of the internal `newStringNoRepl()` method, one allocation per conversion can be avoided when the runtime uses compact strings.
------------- Commit messages: - 8316662: Remove one allocation per conversion in Double.toString(double) and Float.toString(float) Changes: https://git.openjdk.org/jdk/pull/15861/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15861&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8316662 Stats: 388 lines in 3 files changed: 161 ins; 108 del; 119 mod Patch: https://git.openjdk.org/jdk/pull/15861.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15861/head:pull/15861 PR: https://git.openjdk.org/jdk/pull/15861
