perf: last line render caching#20
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mrsobakin wants to merge 1 commit into
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pi-vimwas rerendering last line on each frame, calling an expensivetruncateToWidthfunction. This commit adds caching, which halves the render time.Also, as a nice bonus, upstream callers can match their cache faster, since when
lastLinedoes not change, it literally stays the exact same object, which allows for fast by-reference string comparison.Before (
pi-vim's render takes half of the frame time):After (
pi-vimis fully cached, takes ~0 time):