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Faster calculation of target size

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Since usedTiles and wantedTiles will never have an overlap, we can use their
key count directly.
This commit is contained in:
ahocevar
2019-03-12 08:50:15 +01:00
parent cb2b57232c
commit b4fc249991
1 changed files with 6 additions and 5 deletions
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11
src/ol/renderer/canvas/TileLayer.js
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@@ -7,7 +7,6 @@ import TileState from '../../TileState.js';
import {createEmpty, getIntersection, getTopLeft} from '../../extent.js';
import CanvasLayerRenderer from './Layer.js';
import {apply as applyTransform, compose as composeTransform, makeInverse, toString as transformToString} from '../../transform.js';
import {assign} from '../../obj.js';
/**
* @classdesc
@@ -434,11 +433,13 @@ class CanvasTileLayerRenderer extends CanvasLayerRenderer {
*/
updateCacheSize_(frameState, tileSource) {
const tileSourceKey = getUid(tileSource);
const keys = assign({}, frameState.usedTiles[tileSourceKey]);
if (tileSourceKey in frameState.wantedTiles) {
assign(keys, frameState.wantedTiles[tileSourceKey]);
let size = 0;
if (tileSourceKey in frameState.usedTiles) {
size += Object.keys(frameState.usedTiles[tileSourceKey]).length;
}
if (tileSourceKey in frameState.wantedTiles) {
size += Object.keys(frameState.wantedTiles[tileSourceKey]).length;
}
const size = Object.keys(keys).length;
const tileCache = tileSource.tileCache;
if (tileCache.highWaterMark < size) {
tileCache.highWaterMark = size;