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The problem: Find usages shows the line on which the item is used, this can become a performance issue for css class lookups (from sass files). The class is found multiple times on line 1 of style.min.css (which is what you want, but) The entire 50KB line is shown multiple times in in the find uses window, which causes tremendous lag in the interface. Proposed solution: Also show the column number (Example: 1:123 for line 1 character 123) and when the line is longer than 200 chars only show a small portion of the line. Could be related to #237759
This is probably related to bug #252602 if you are using Maven.