100pah commented on a change in pull request #8997: Pie chart adds filterValue 
parameter
URL: https://github.com/apache/incubator-echarts/pull/8997#discussion_r225535214
 
 

 ##########
 File path: src/chart/pie/PieView.js
 ##########
 @@ -211,7 +211,20 @@ piePieceProto.updateData = function (data, idx, 
firstCreate) {
     graphic.setHoverStyle(this);
 };
 
-piePieceProto._updateLabel = function (data, idx) {
+piePieceProto._getFilterIgnore = function(data, idx) {
+    var seriesModel = data.hostModel;
+    var itemModel = data.getItemModel(idx);
+    var valueDim = data.mapDimension('value');
+    var sum = data.getSum(valueDim);
 
 Review comment:
   The `sum` is not necessary to be calculated in each iteration of the loop. 
Only calculate it once outside the loop.

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