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perf(web): increase tile cache zoom levels and reduce fade duration #39

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Merged
beetlebugorg merged 1 commit into from
Jul 2, 2026
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perf(web): increase tile cache zoom levels and reduce fade duration #39

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8 changes: 8 additions & 0 deletions web/src/chart-canvas/chart-canvas.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -335,6 +335,14 @@ export class ChartCanvas extends HTMLElement {
// Attribution bottom-left so the bottom-right corner is free for the app's
// scale/zoom readout.
attributionControl: { position: "bottom-left" },
// Keep tiles across the full zoom range (z3.5–18 = 15 levels) so zooming in
// and out finds previously-rendered tiles already in cache rather than
// re-requesting them. The default (5) is too narrow for a chart plotter where
// users routinely swing between overview and approach scales.
maxTileCacheZoomLevels: 20,
// Tile fade-in duration. The default 300ms makes pan feel laggy as new tiles
// fade in slowly; 100ms is still smooth but noticeably snappier.
fadeDuration: 100,
});
this._map = map;
this.map = map; // public handle
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