X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;ds=sidebyside;f=plugins%2Frange-selector.js;h=717f85059442578e9e37a9aafc8cb351bc688938;hb=ec8cc8b206a5ec69ec5c9ca786d2b127e6c00c72;hp=88425461a59a41fc6ade35b2631bd37cc3b71d1c;hpb=85adc3fe50381b61dc4afa1f96fb62e835a77f18;p=dygraphs.git

diff --git a/plugins/range-selector.js b/plugins/range-selector.js
index 8842546..717f850 100644
--- a/plugins/range-selector.js
+++ b/plugins/range-selector.js
@@ -594,6 +594,13 @@ rangeSelector.prototype.drawMiniPlot_ = function() {
     var dataPoint = combinedSeriesData.data[i];
     var x = ((dataPoint[0] !== null) ? ((dataPoint[0] - xExtremes[0])*xFact) : NaN);
     var y = ((dataPoint[1] !== null) ? (canvasHeight - (dataPoint[1] - combinedSeriesData.yMin)*yFact) : NaN);
+
+    // Skip points that don't change the x-value. Overly fine-grained points
+    // can cause major slowdowns with the ctx.fill() call below.
+    if (!stepPlot && prevX !== null && Math.round(x) == Math.round(prevX)) {
+      continue;
+    }
+
     if (isFinite(x) && isFinite(y)) {
       if(prevX === null) {
         ctx.lineTo(x, canvasHeight);