[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3991) Bad performance when clearing big sessions

[Thomas Jacob (JIRA)]

Bad performance when clearing big sessions
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                 Key: HHH-3991
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3991
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
            Reporter: Thomas Jacob


If a session has many proxies, clearing is very slow.
The reason is the AbstractLazyInitializer.setSession checks if the proxy is already connected to another session, which in turn linearily iterates through a referenced map.
Since the method receives a null (clearing unsets the session), this check is not necessary.

I suggest setSession's line 2 to be changed from
	if ( isConnectedToSession() ) {
to
	if ( s!= null && isConnectedToSession() ) {

In addition, the linear iterations should be replaced, as a performance improvement.


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