> This patch adds special-cases to `Arrays.copyOf` and `Arrays.copyOfRange` to > clone arrays when `newLength` or range inputs span the input array. This > helps eliminate range checks and has been verified to help various String > operations. Example: > > Baseline > > Benchmark (size) Mode Cnt > Score Error Units > StringConstructor.newStringFromArray 7 avgt 15 > 16.817 ± 0.369 ns/op > StringConstructor.newStringFromArrayWithCharset 7 avgt 15 > 16.866 ± 0.449 ns/op > StringConstructor.newStringFromArrayWithCharsetName 7 avgt 15 > 22.198 ± 0.396 ns/op > > Patch: > > Benchmark (size) Mode Cnt > Score Error Units > StringConstructor.newStringFromArray 7 avgt 15 > 14.666 ± 0.336 ns/op > StringConstructor.newStringFromArrayWithCharset 7 avgt 15 > 14.582 ± 0.288 ns/op > StringConstructor.newStringFromArrayWithCharsetName 7 avgt 15 > 20.339 ± 0.328 ns/op
Claes Redestad has updated the pull request incrementally with one additional commit since the last revision: Err on the side of copyOf ------------- Changes: - all: https://git.openjdk.org/jdk/pull/12453/files - new: https://git.openjdk.org/jdk/pull/12453/files/c906c730..85b50169 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=12453&range=07 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12453&range=06-07 Stats: 90 lines in 1 file changed: 56 ins; 23 del; 11 mod Patch: https://git.openjdk.org/jdk/pull/12453.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12453/head:pull/12453 PR: https://git.openjdk.org/jdk/pull/12453
