> Since JDK 18 some implementations of InputStream.transferTo, namely > FileInputStream and ChannelInputStream, offload work to lower layers using > NIO channels. This provides shorter execution time and reduced resource > consumption. Unfortunately, this effect is prevented once the input stream > itself is wrapped by a SequenceInputStream. While compared to other > InputStreams the SequenceInputStream is a rather edge case (e. g. used to > merge two files into one), nevertheless it makes sense to get rid of this > obstacle simply by implementing transferTo (e. g. by allowing to offload the > file merge, or parts of the file merge, to the operating system). As a > result, more existing applications will experience the > offloading-improvements made by JDK 18. > > To provide enhanced performance to existing applications, it makes sense to > address this impediment: SequenceInputStream.transferTo should be implemented > in a way that iteratively calls transferTo on each enumerated InputStream of > the SequenceInputStream in ordered sequence.
Markus KARG has updated the pull request incrementally with one additional commit since the last revision: fixed bug number ------------- Changes: - all: https://git.openjdk.org/jdk/pull/11248/files - new: https://git.openjdk.org/jdk/pull/11248/files/7d63db24..22d99ba0 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=11248&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11248&range=00-01 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/11248.diff Fetch: git fetch https://git.openjdk.org/jdk pull/11248/head:pull/11248 PR: https://git.openjdk.org/jdk/pull/11248
