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Do not use Array.prototype.forEach for potentially large arrays

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This commit is contained in:
Andreas Hocevar
2017-07-29 23:10:53 +02:00
parent 2258c00fca
commit 1b46f38696
3 changed files with 13 additions and 5 deletions
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6
src/ol/renderer/canvas/vectorlayer.js
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@@ -319,7 +319,7 @@ ol.renderer.canvas.VectorLayer.prototype.prepareFrame = function(frameState, lay
feature, resolution, pixelRatio, styles, replayGroup);
this.dirty_ = this.dirty_ || dirty;
}
};
}.bind(this);
if (vectorLayerRenderOrder) {
/** @type {Array.<ol.Feature>} */
var features = [];
@@ -331,7 +331,9 @@ ol.renderer.canvas.VectorLayer.prototype.prepareFrame = function(frameState, lay
features.push(feature);
}, this);
features.sort(vectorLayerRenderOrder);
features.forEach(renderFeature, this);
for (var i = 0, ii = features.length; i < ii; ++i) {
renderFeature(features[i]);
}
} else {
vectorSource.forEachFeatureInExtent(extent, renderFeature, this);
}