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[dev-200405171800, JDK 1.5.0] First open of ant script is very slow, takes about 3-4 sec., any next opening of any other script is fast.
Probably it is loading and introspecting the Ant installation for purposes of code completion. I don't know if there is anything that can be done differently other than deferring the pause until some later time, or pushing some of the delay forward into the init warmup sequence, etc.
I believe this is fixed, since the new tree GUI should not need to load IntrospectedInfo. You will still pay the first time you invoke Ant code completion or run a script.
Yes, expanding Ant script node is much faster now. Verified in dev-200406230100.