optimize projections with more precise tile cover
Open
@ansis is already working on this.
Since Nov 17, 2021.
bug :lady_beetle:
performance :zap:
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Description
Non-mercator projections are slower to load than mercator at higher zoom levels. `winkelTripel` is roughly ~17% slower in our benchmarks. It looks like most of this is caused by [imprecise bounds checking](https://github.com/mapbox/mapbox-gl-js/blob/107a5256bebb4d06c6fb073618632d865e48e5b9/src/geo/transform.js#L747-L760), which leads to loading tiles that are entirely offscreen. This affects both loading and rendering performance.
Mercator maps are not affected by this.
cc @mourner
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