[CLOSED] Defer most Quick View processing until after delay

[core-ai-bot]

Issue by redmunds
Friday May 30, 2014 at 17:56 GMT
Originally opened as adobe/brackets#7988

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This is for #6538. This uses the getHoveredEditor() function from@SAPlayer's pull request #6571, so this is a replacement of that PR.

Details:

• only processes mousemove event in requestAnimationFrame()
• defers all processing until after setTimeout() delay
• exception: when Quick View is already being displayed, then processing is immediate

Results:
I did some simple profiling on Win7 using the src/extensions/default/QuickView/unittest-files/test.css file and Process Explorer. I moved mouse over the css rules in that file at an even pace -- so that only mouse processing was executed (i.e. didn't stop long enough to display Quick View).

• Before: cpu averages ~2%
• After: cpu averages ~1%

cc:@peterflynn,@dangoor

Note: this is a squashed version of PR #6697 (which was used for testing a Travis problem, so had several unnecessary commits)

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redmunds included the following code: https://github.com/adobe/brackets/pull/7988/commits