> At some point the `JPEGImageWriter` was optimized to reduce duplication / > copying of rasters and data buffers (see `JDK-6266748`). However, > `PNGImageWriter` never received a similar optimization, and is making > unnecessary copies of raster and data buffers whenever PNG images are written. > > Measurements: In a local test, `PNGImageWriter.write( )` and callees were > initially showing up as an allocation hotspot (~400k objects / ~65 MB > allocated), but after these optimizations I'm seeing much better numbers > (~400 objects / ~740 KB allocated).
Daniel Gredler has updated the pull request incrementally with two additional commits since the last revision: - JDK-8337681: add tests for TYPE_4BYTE_ABGR - JDK-8337681: add tests for TYPE_INT_RGB ------------- Changes: - all: https://git.openjdk.org/jdk/pull/20432/files - new: https://git.openjdk.org/jdk/pull/20432/files/bf1632ac..9285d44c Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=20432&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20432&range=00-01 Stats: 9 lines in 1 file changed: 8 ins; 1 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/20432.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/20432/head:pull/20432 PR: https://git.openjdk.org/jdk/pull/20432
