Replaces the implementation `readAllCharsAsString().lines().toList()` with reading into a temporary `char` array which is then processed to detect line terminators and copy non-terminating characters into strings which are added to the list.
------------- Commit messages: - 8358533: Improve performance of java.io.Reader.readAllLines Changes: https://git.openjdk.org/jdk/pull/25863/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25863&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8358533 Stats: 142 lines in 2 files changed: 130 ins; 10 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/25863.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/25863/head:pull/25863 PR: https://git.openjdk.org/jdk/pull/25863
