Add an index for names at low zoom #4617
Merged
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One of the slowest queries at zoom 5 is for the text-poly-low-zoom
layer. This index speeds it up, and similar queries up substantially.
No rendering changes.
This index brings a text_poly_low_zoom query down from 120s-31s warm and 6.5s hot to 825ms hot, and improves the experience when developing low zooms.
Index build time on my system is 6:35, and index size is 31MB.