Enable CDS for zero builds. `java --version` is about 2x faster now.
$ perf stat -r 40 ./images/jdk/bin/java -Xshare:off -version 0.034645 +- 0.000044 seconds time elapsed ( +- 0.13% ) $ perf stat -r 40 ./images/jdk/bin/java -version 0.018080 +- 0.000388 seconds time elapsed ( +- 2.15% ) I also fixed a bug in Images.gmk that always wrote the default archive to $JAVA_HOME/lib/server. This fix also makes it possible for a client libjvm to have a default CDS archive. ------------- Commit messages: - clean up C code - 8290981: Enable CDS for zero builds Changes: https://git.openjdk.org/jdk/pull/9869/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9869&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8290981 Stats: 85 lines in 5 files changed: 32 ins; 25 del; 28 mod Patch: https://git.openjdk.org/jdk/pull/9869.diff Fetch: git fetch https://git.openjdk.org/jdk pull/9869/head:pull/9869 PR: https://git.openjdk.org/jdk/pull/9869
