问题
Since recently it's much slower running a program in Debug mode in Eclipse Galileo.
I'm not aware of any changes.
Do you know what could be the cause? Running it normally is not a problem.
回答1:
Another "debugging break" is the use of method entry/exit breakpoints.
Did you try to remove all breakpoint definitions once?
Sometimes i think Eclipse is getting out of synch with some of its internal/displayed state. Perhaps you should try to setup a new (not copy) of your workspace. This sometimes helps me to recover from spurious features.
This is how you can remove all breakPoints
Eclipse -> Run -> Remove All Breakpoints - for removing all Breakpoints for all Time
Eclipse -> Run -> Skip All Breakpoints - for temporary remove breakpoints
回答2:
I faced this issue lot of time. Solution is simple, Remove all breakpoints. (Run >> Remove All Breakpoints)
回答3:
I was just running a program in Eclipse debug mode that was almost instant without debugging but when I ran it in debug mode, it was really slow. I went through and deleted a ton of random useless breakpoints I wasn't using and then the program sped up A LOT (200x or so).
回答4:
Disable 'Show method result after a step operation'.
回答5:
I have found that i often forget that i have a bunch of expressions added to the expressions panel that are no longer needed that are none the less being evaluated (or are failing to evaluate) and this slows stuff down a good deal. Make sure that you keep those expressions cleared out when not needed.
回答6:
What kind of JVM are you attaching to? I found in my experience, that in debug mode IBM JDK is slow like hell. For all JVMs, check if you have conditional breakpoints with expensive condition. Try disable breakpoints. You may have exception breakpoints or expressions. Try disable or remove them.
回答7:
Close eclipse... clear %temp% folder, temp folder... disable breakpoints... in most cases this will definitely solve the problem.
回答8:
Clearing temp files on Windows fixed it for me
"C:\\Documents and Settings\\{user}\\Local Settings\\Temp"
回答9:
In my case, Eclipse was trying to build files, which I was doing manually. Going to Window -> Preferences -> Run/Debug -> Launching, and then disabling "Build (if required) before Launching" underneath General Options solved the slowness.
回答10:
Normally Java Virtual Machine turns off Just in time compiler (JIT) when running in debug mode. On IBM WebSphere, the IBM JDK is heavy de-optimized and will be very slow. By the way debugging also make impossible to recompile and optimize the code.
Relay on logging for complex debugging: it will save your days on production, where you cannot debug for sure.
回答11:
With all the learning over the years working with eclipse, here are couple of suggestions
- keep your open projects to minimal what you actually need
- keep it lean and thin - uninstall the plugins/features which you don't use (mylnn, validations etc).
- No matter what you do, the eclipse tend to get slower over the time. The ultimate solution to get a responsive IDE is to recycle your existing workspace (create new workspace and bring in the projects which you need).
回答12:
Before you run your application in debug mode press on
(disable all breakpoints) and you wont experience slow loading or any problems. After your application has started just enable the breakpoints and then you can debug your code.
回答13:
Clearing all breskpoints .. Worked for me
来源：https://stackoverflow.com/questions/4591187/running-a-program-in-debug-mode-is-incredible-slow