> I have been looking into `make clean-images images` performance, and realized > jmod keeps compressing files with default compression level. Tuning that > toward lighter compression levels improves build performance considerably, > without a heavy loss in *.jmod sizes. > > This PR allows JMOD to select the compression level. Follow-ups would use > this in the build system, see #10214. > > The interesting asymmetry against `jlink` is: `jlink` provides `--compress` > option that only takes `2` for "ZIP compression". (Separately, we could argue > if it would be beneficial to extend `--compress` to `jlink` as well, so to > select the compression level there too.)
Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision: More review comments ------------- Changes: - all: https://git.openjdk.org/jdk/pull/10213/files - new: https://git.openjdk.org/jdk/pull/10213/files/59eec8c2..44b64021 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=10213&range=03 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10213&range=02-03 Stats: 22 lines in 3 files changed: 14 ins; 0 del; 8 mod Patch: https://git.openjdk.org/jdk/pull/10213.diff Fetch: git fetch https://git.openjdk.org/jdk pull/10213/head:pull/10213 PR: https://git.openjdk.org/jdk/pull/10213
