During JVM startup, the class KnownOIDs is loaded. KnownOIDs has 10 anonymous classes, which slows down the startup. This PR is to improve KnownOIDs and eliminate unnecessary embedded classes.
Here's how to reproduce this: public class Startup { public static void main(String[] args) {} } java -verbose:class Startup [0.665s][info][class,load] sun.security.util.KnownOIDs [0.666s][info][class,load] sun.security.util.KnownOIDs$1 [0.667s][info][class,load] sun.security.util.KnownOIDs$2 [0.667s][info][class,load] sun.security.util.KnownOIDs$3 [0.668s][info][class,load] sun.security.util.KnownOIDs$4 [0.668s][info][class,load] sun.security.util.KnownOIDs$5 [0.668s][info][class,load] sun.security.util.KnownOIDs$6 [0.668s][info][class,load] sun.security.util.KnownOIDs$7 [0.669s][info][class,load] sun.security.util.KnownOIDs$8 [0.669s][info][class,load] sun.security.util.KnownOIDs$9 [0.669s][info][class,load] sun.security.util.KnownOIDs$10 ------------- Commit messages: - Eliminating nested classes Changes: https://git.openjdk.org/jdk/pull/23411/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23411&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8349400 Stats: 58 lines in 1 file changed: 10 ins; 33 del; 15 mod Patch: https://git.openjdk.org/jdk/pull/23411.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/23411/head:pull/23411 PR: https://git.openjdk.org/jdk/pull/23411