I recently changed my working environment from Windows to MacOS X and experienced performance issue when tried to move between segments using keyboard. Depending on document size, it even took 2-3 seconds just to go to previous/next segment.
While I was tracing down the issue, I found it was caused by bad performance of JTextPane (used in TranslationView) on Mac version of Java. If translated text is big enough, it takes long time on Mac to reset the text on TranslationView.
Thus the issue might be solved by
- reducing the size of text displayed on TranslationView or
- avoiding the reset if TranslationView is turned off.
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