perf(treesitter): set regions early #587
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The get_parser and TSHighlight:new both parse the buffer which takes a lot of time since there are many error nodes, so set regions early to prevent this.
Both get_parser and TSHighlighter.new calls this parse, which calls parse_regions, and this call to included_regions is crucial, it will return an empty range, thus parse the entire buffer.
with this change, included_regions no longer return empty range, thus result in faster highlight.
related: MagicDuck/grug-far.nvim#286