Nodeclipse CoffeeScript Viewer (Editor before Eclipse 4.3.1) 0.4.0-201403250304

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Keeps freezing up when saving files, too.

Kepler, Ubuntu Precise.

It is first time a performance issue is mentioned and I doubt it is related to this plugin.
Use GitHub issue tracker to raise an issue.
You should give OS, Java, Eclipse version info.
Marketplace reviews are not the place for such discussion.