It looks like we can skip copying of `byte[]` in `BufferedInputStream.implTransferTo()` for `OutputStreams` residing in `java.io`.
See comment by @vlsi in https://github.com/openjdk/jdk/pull/10525/files#diff-e19c508d1bb6ee78697ecca66947c395adda0d9c49a85bf696e677ecbd977af1R612 ------------- Commit messages: - 8320971: Use BufferedInputStream.class.getPackageName() - 8320971: Use BufferedInputStream.buf directly when param of implTransferTo() is trusted Changes: https://git.openjdk.org/jdk/pull/16879/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16879&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8320971 Stats: 8 lines in 1 file changed: 5 ins; 0 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/16879.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16879/head:pull/16879 PR: https://git.openjdk.org/jdk/pull/16879
