From 492335a4ee2be6feb7430af43219192ba38c9db2 Mon Sep 17 00:00:00 2001
From: pissang <bm2736892@gmail.com>
Date: Tue, 26 Dec 2017 17:03:38 +0800
Subject: [PATCH] Tweak

---
 src/chart/helper/LargeSymbolDraw.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/chart/helper/LargeSymbolDraw.js b/src/chart/helper/LargeSymbolDraw.js
index 067e83889..16149d182 100644
--- a/src/chart/helper/LargeSymbolDraw.js
+++ b/src/chart/helper/LargeSymbolDraw.js
@@ -21,6 +21,8 @@ var LargeSymbolPath = graphic.extendShape({
         var symbolProxy = this.symbolProxy;
         var symbolProxyShape = symbolProxy.shape;
         var ctx = path.getContext ? path.getContext() : path;
+        var canBoost = ctx && size[0] < 4;
+
         for (var i = 0; i < points.length;) {
             var x = points[i++];
             var y = points[i++];
@@ -33,7 +35,7 @@ var LargeSymbolPath = graphic.extendShape({
                 size = sizes[i];
             }
 
-            if (size[0] < 4) {
+            if (canBoost) {
                 // Optimize for small symbol
                 // PENDING, Do fill in buildPath??
                 ctx.fillRect(
-- 
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