Sanne Grinovero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNTBlNWUzN2Nl... ) / Task ( https://hibernate.atlassian.net/browse/HHH-16884?atlOrigin=eyJpIjoiNTBlNW... ) HHH-16884 ( https://hibernate.atlassian.net/browse/HHH-16884?atlOrigin=eyJpIjoiNTBlNW... ) Improve efficiency of UpdateCoordinatorStandard in tracking tables to be updated ( https://hibernate.atlassian.net/browse/HHH-16884?atlOrigin=eyJpIjoiNTBlNW... ) Issue Type: Task Assignee: Sanne Grinovero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Components: hibernate-core Created: 03/Jul/2023 07:18 AM Fix Versions: 6.3.0 Labels: performance Priority: Major Reporter: Sanne Grinovero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) The current implementation of `UpdateCoordinatorStandard` leads to an high amount of allocations, as it attempts to track which tables are going to be updated by using 4 different HashSet implementations. These 4 HashSet instances are being allocated for each update operation, and each entity instance within the overall update; some of them will remain empty. Also noticeable, each Table within this scope is identified by a unique, short number. I’m planning to introduce a small and simple wrapper around BitSet to replace these sets. ( https://hibernate.atlassian.net/browse/HHH-16884#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16884#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100228- sha1:e911e2c )