From: Ben McCann <322311+benmccann@users.noreply.github.com>
Date: Sat, 2 Nov 2019 13:17:29 +0000 (-0700)
Subject: Stop unnecessary line calculations (#6671)
X-Git-Tag: v2.9.3~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F6679%2Fhead;p=thirdparty%2FChart.js.git

Stop unnecessary line calculations (#6671)
---

diff --git a/src/controllers/controller.line.js b/src/controllers/controller.line.js
index 350e53999..4f452d66d 100644
--- a/src/controllers/controller.line.js
+++ b/src/controllers/controller.line.js
@@ -229,12 +229,13 @@ module.exports = DatasetController.extend({
 		var yScale = me._yScale;
 		var sumPos = 0;
 		var sumNeg = 0;
-		var rightValue = +yScale.getRightValue(value);
-		var metasets = chart._getSortedVisibleDatasetMetas();
-		var ilen = metasets.length;
-		var i, ds, dsMeta, stackedRightValue;
+		var i, ds, dsMeta, stackedRightValue, rightValue, metasets, ilen;
 
 		if (yScale.options.stacked) {
+			rightValue = +yScale.getRightValue(value);
+			metasets = chart._getSortedVisibleDatasetMetas();
+			ilen = metasets.length;
+
 			for (i = 0; i < ilen; ++i) {
 				dsMeta = metasets[i];
 				if (dsMeta.index === datasetIndex) {