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Optimize tree-sitter HighlightIterator when there are many injections #18435
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This was referenced Nov 14, 2018
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In the course of addressing atom/language-javascript#600, I noticed that when there are a large number of language injections in a large file, highlighting operations and scope descriptor queries become very slow. Specifically, this line of code.
In atom/text-buffer#305, I made it possible to avoid examining every single injection when seeking a highlight iterator. This PR takes advantage of that capability.