I always have the habit of turning on white space visibility while coding, because I like to keep my coding clean and see straight away when spaces and tabs are used. However, this has really big impact on performance on Eclipse PDT ( I am using Helios ) in Mac, as it will slow down your typing when PDT has trouble to display the characters you type on the screen at the speed you type. I have never had this problem on WIndows platform though.

To turn off the “whitespace characters” go to Eclipse > Preferences > General > Editors > Text Editors and un-tick the “show whitespace characters”, then you should be fine.

If anyone know the reason behind it, please let me know. Many thanks.

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