Hello! I created PR is scope of jenkins-core project: https://github.com/jenkinsci/jenkins/pull/10659 Jira ticket: https://issues.jenkins.io/browse/JENKINS-75675
In this PR i propped to override protected Object getClassLoadingLock(String className) method and use weak references for lock objects Jenkins is a plugable platform, each plugin has its own class loader and its parallelLockMap may consume 10mb of RAM. As a result it might have 2gb overhead if ~200 plugins installed. Jenkins maintainers ask me to consider making this improvement in base
