I\'m trying to use Eclipse Juno (Version: 4.2.0 Build id: I20120608-1400) with WTP for JavaScript/Node.js development on MacOSX Lion, on my 4GB RAM MacBook Pro. Sometimes it get
Try using a different perspective (the Resource one, for example) and restart Eclipse.
Does it help?
Found a a bug report (id : 385272) raised for slow Juno response times.
unfortunately i can second that. juno is unusable slow in comparison to indigo. with every click i have to wait multiple seconds for a reaction of the gui. i too can exclude the reason might be on the side of my hardware.
You should disable validation of your Node.js and other JavaScript libs as they should be validated by their providers. Try this: https://stackoverflow.com/a/19909401/1040124
I encounter the same issue, and seems to be solved by select the checkbox "Use virtual memory mapping", you can see the option on, Preference-->Team-->Git-->Window Cache
For me, the issue is only happening in the PHP perspective. Launching Eclipse Juno in a different perspective and then switching to the PHP perspective made the tab switching reasonable.
A less cumbersome and permanent solution exists, which is quite straightforward. Installing Web Development Tools fixes this issue.