[NETBEANS-4037] Debugger slow - taken profiler snapshots

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 8.2, 11.1, 11.2, 11.3
• Fix Version/s: 12.0
• Component/s: debugger - Java
• Labels: performance pull-request-available
• Assignee: Jan Lahoda
• Reporter: matteodg
• Created: 18/Mar/20 15:09
• Updated: 22/Apr/20 09:54

Description

We have a pretty big NetBeans Platform Application (~180 modules and 5 suites) and when the debugger reaches the first breakpoint it got stuck: the tabs Debugging, Variables, Breakpoints, etc. are all with a "Please wait..." node and with the NetBeans sampler I took a few snapshots highlighting it is spending a lot of time on calls like:

• org.netbeans.modules.debugger.jpda.ui.SourcePath.getURL()
• org.netbeans.modules.debugger.jpda.ui.SourcePath.annotate()

which at the end boil down to a lot of calls like:

• java.util.concurrent.CopyOnWriteArrayList.remove()
• java.io.File.isFile()

Attached the snapshots.

Then if I press Continue the debugger remain stuck: now Pause and Continue buttons in the toolbar are disabled...

I kept close and restarting NetBeans but no luck... I remember got this behavior even with NB 8.2, sometimes though it goes through and I'm able to debug, but very rarely!

 

Issue Links

• links to: GitHub Pull Request #2090