Jonathan Halliday created JBTM-2990: --------------------------------------- Summary: ThreadUtil performance improvement Key: JBTM-2990 URL: https://issues.jboss.org/browse/JBTM-2990 Project: JBoss Transaction Manager Issue Type: Enhancement Components: Transaction Core Affects Versions: 5.7.2.Final Reporter: Jonathan Halliday Assignee: Jonathan Halliday Priority: Minor The ThreadUtil changes introduced for the bug fix under JBTM-2673, cause lock contention on the static WeakHashMap under high load. The proposed fix is to partially reintroduce the earlier behavior of caching the value in a ThreadLocal, since the dominant use case is pooled threads repeatedly looking up their own identity. The global lookup capability introduced for the fix remains necessary for less common use cases, but the locking can be taken off the critical path for most workloads. -- This message was sent by Atlassian JIRA (v7.5.0#75005)