eclipse become very slow with scala plugin

Hi,

I am using Scala eclipse plugin ,but with this plugin eclipse become very sl= ow.

I have following eclipse.ini

-showsplash

org.eclipse.platform

--launcher.XXMaxPermSize

256M

-framework

plugins\org.eclipse.osgi_3.4.3.R34x_v20081215-1030.jar

-vmargs

-Dosgi.requiredJavaVersion=3D1.5

-Xms256m

-Xmx1024m

How to fix this

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