Steve Ebersole ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HHH-16129 ( https://hibernate.atlassian.net/browse/HHH-16129?atlOrigin=eyJpIjoiYjRiY2... ) Re: @Converter(autoapply=true) slow ( https://hibernate.atlassian.net/browse/HHH-16129?atlOrigin=eyJpIjoiYjRiY2... ) As I mentioned on the forum, these 2 things are not going to be equal - they are different concepts. @ConverterRegistration is quick to resolve because it was designed that way. It is not a JPA concept, and so we are free to do that how we want. We are more restricted when it comes to auto-applied converters as that is a JPA concept and we need to abide by its requirements. That being said, it is always a good idea to address performance issue when and where we can. Here specifically, I am suspiciously eyeing 2 things: * The use of lambdas ( matcher ) used in the auto-apply case. Those can easily be transformed to method references * The stream/filter/collect combo used in the auto-apply case. Perhaps you’d be willing to take a swing at a PR for that and see if that helps your performance numbers? ( https://hibernate.atlassian.net/browse/HHH-16129#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16129#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#100216- sha1:7a51a57 )