Sanne Grinovero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiOGViNTIzMGQx... ) / Task ( https://hibernate.atlassian.net/browse/HHH-16091?atlOrigin=eyJpIjoiOGViNT... ) HHH-16091 ( https://hibernate.atlassian.net/browse/HHH-16091?atlOrigin=eyJpIjoiOGViNT... ) AbstractStandardBasicType to avoid megamorphic dispatch when dealing with AbstractClassJavaType ( https://hibernate.atlassian.net/browse/HHH-16091?atlOrigin=eyJpIjoiOGViNT... ) Issue Type: Task Assignee: Sanne Grinovero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Created: 24/Jan/2023 09:26 AM Fix Versions: 6.2.0 Labels: performance Priority: Minor Reporter: Sanne Grinovero ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Benchmarking has shown that the very frequent invocations on AbstractClassJavaType’s methods isEqual and getHashCode are megamorphic invocations; from domain knowledge we know that there’s a very high chance that the JavaType on which we’re dispatching is going to be an AbstractClassJavaType - we can help the dispatching process by making an explicit check for this. ( https://hibernate.atlassian.net/browse/HHH-16091#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16091#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#100214- sha1:01e0849 )