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https://issues.apache.org/jira/browse/FLEX-33216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13476032#comment-13476032
]
Maurice Amsellem edited comment on FLEX-33216 at 10/15/12 8:47 AM:
-------------------------------------------------------------------
One reason of this performance degradation is that Flex4 Chart style
initialization is called for every instance, whereas it should be called only
once.
Example for CartesianChart:
override public function set
moduleFactory(factory:IFlexModuleFactory):void
{
super.moduleFactory = factory;
if (_moduleFactoryInitialized)
return;
_moduleFactoryInitialized = true;
initStyles();
styleManager.registerInheritingStyle("axisTitleStyleName");
}
private function initStyles():Boolean
{
HaloDefaults.init(styleManager);
var cartesianChartStyle:CSSStyleDeclaration =
HaloDefaults.createSelector("mx.charts.chartClasses.CartesianChart",
styleManager);
cartesianChartStyle.defaultFactory = function():void
{
this.axisColor = 0xD5DEDD;
this.chartSeriesStyles =
HaloDefaults.chartBaseChartSeriesStyles;
this.dataTipRenderer = DataTip;
this.fill = new SolidColor(0xFFFFFF, 0);
this.calloutStroke = new Stroke(0x888888,2);
this.fontSize = 10;
this.horizontalAxisStyleName = "blockCategoryAxis";
this.secondHorizontalAxisStyleName =
"blockCategoryAxis";
this.secondVerticalAxisStyleName = "blockNumericAxis";
this.verticalAxisStyleName = "blockNumericAxis";
this.horizontalAxisStyleNames = ["blockCategoryAxis"];
this.verticalAxisStyleNames = ["blockNumericAxis"];
}
return true;
}
Chart support classes are also affected.
was (Author: mamsellem):
One reason of this performance degradation is that Flex4 Chart style
initialization is called for every instance, whereas it should be called only
once.
Example for CartesianChart:
override public function set
moduleFactory(factory:IFlexModuleFactory):void
{
super.moduleFactory = factory;
if (_moduleFactoryInitialized)
return;
_moduleFactoryInitialized = true;
initStyles();
styleManager.registerInheritingStyle("axisTitleStyleName");
}
private function initStyles():Boolean
{
HaloDefaults.init(styleManager);
var cartesianChartStyle:CSSStyleDeclaration =
HaloDefaults.createSelector("mx.charts.chartClasses.CartesianChart",
styleManager);
cartesianChartStyle.defaultFactory = function():void
{
this.axisColor = 0xD5DEDD;
this.chartSeriesStyles =
HaloDefaults.chartBaseChartSeriesStyles;
this.dataTipRenderer = DataTip;
this.fill = new SolidColor(0xFFFFFF, 0);
this.calloutStroke = new Stroke(0x888888,2);
this.fontSize = 10;
this.horizontalAxisStyleName = "blockCategoryAxis";
this.secondHorizontalAxisStyleName =
"blockCategoryAxis";
this.secondVerticalAxisStyleName = "blockNumericAxis";
this.verticalAxisStyleName = "blockNumericAxis";
this.horizontalAxisStyleNames = ["blockCategoryAxis"];
this.verticalAxisStyleNames = ["blockNumericAxis"];
}
return true;
}
> Chart initialization performance degradation between Flex 3 and Flex 4
> ----------------------------------------------------------------------
>
> Key: FLEX-33216
> URL: https://issues.apache.org/jira/browse/FLEX-33216
> Project: Apache Flex
> Issue Type: Bug
> Components: Charts
> Affects Versions: Adobe Flex SDK 4.1 (Release), Adobe Flex SDK 4.5
> (Release), Adobe Flex SDK 4.6 (Release)
> Reporter: Maurice Amsellem
> Labels: performance
>
> Chart initialization is around 35-40% slower in Flex4 than in Flex3.
> This is true for almost all chart types (Bar, Pie, Column, etc.)
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