I would recommend using the profiler to understand what is taking all of the time. Then we can help strategize on how to fix it. Post a link to a screenshot of a performance sample if you need help deciphering the output.
-Alex On 9/24/14 7:18 AM, "Philip Medlam" <[email protected]> wrote: >OK, my bad, the binding does work. Still a slow sampling rate (about 9Hz) >from the Accelerometer. > >So, if anyone has an idea on how to improve the accelerometer sampling >rate >whilst displaying an updated chart, I would be grateful. > >My code for the AS chart is as follows: > >*<?xml version="1.0"?>* >*<!--* >* Created by npem on 09/08/2014.* >*-->* >*<s:View xmlns:fx="http://ns.adobe.com/mxml/2009 ><http://ns.adobe.com/mxml/2009>" >xmlns:s="library://ns.adobe.com/flex/spark ><http://ns.adobe.com/flex/spark>"* >* xmlns:mx="library://ns.adobe.com/flex/mx ><http://ns.adobe.com/flex/mx>"* >* title="Seismograph"* >* actionBarVisible="false"* >* creationComplete="init()"* >* >* > > > > >* <fx:Script>* >* <![CDATA[* >* import mx.charts.LineChart;* >* import mx.charts.series.LineSeries;* >* import mx.collections.ArrayCollection;* >* import mx.charts.BarChart;* >* import mx.charts.series.BarSeries;* >* import mx.charts.CategoryAxis;* > >* [Bindable]* >* public var zVector:ArrayCollection = new ArrayCollection([* >* {myTime: 1, zAccel: 2},* >* {myTime: 2, zAccel: 4.4},* >* {myTime: 5, zAccel: 7.2}* >* ]);* > >* public var myChart:LineChart;* >* public var series1:LineSeries;* > >* public function init():void {* >* /* Create the chart object and set some* >* basic properties. */* >* myChart = new LineChart();* >* myChart.showDataTips = true;* >* myChart.dataProvider = zVector;* > >* /* Define the category axis. */* >* var vAxis:CategoryAxis = new CategoryAxis();* >* vAxis.categoryField = "zAccel";* >* vAxis.dataProvider = zVector;* >* myChart.verticalAxis = vAxis;* > >* /* Add the series. */* >* var mySeries:Array = new Array();* >* series1 = new LineSeries();* >* series1.xField = "myTime";* >* series1.yField = "zAccel";* >* series1.displayName = "zAccel";* >* mySeries.push(series1);* > >* myChart.series = mySeries;* > >* ;* > >* /* Attach chart and legend to the display list. */* >* p1.addElement(myChart);* >* }* > >* private function button1_clickHandler(event:MouseEvent):void* >* {* >* zVector.addItem({myTime: 10, zAccel: 15});* >* }* >* ]]>* >* </fx:Script>* > > > >* <s:Panel id="p1" title="BarChart Created in ActionScript"* >* width="100%" height="100%" >* >* <s:layout>* >* <s:VerticalLayout/>* >* </s:layout>* > >* <s:Button label="Update" click="button1_clickHandler(event)"/>* >* </s:Panel>* > > >*</s:View>* > > >On Mon, Sep 22, 2014 at 3:57 PM, Philip Medlam <[email protected]> >wrote: > >> Hi, I am trying to speed up a Flex/AS mobile application. >> >> As it stands, the lineChart (100 points) has a binding to an >> arrayCollection. >> >> What I add a point, I also remove the first element in the array and >> change the minimum x-axis value to simulate a scrolling chart. >> >> Now the data is supplied from the accelerometer. >> Without showing the live chart my accelerometer sample rate is about >>60Hz. >> >> When I show my mxml lineChart it is about 9Hz. >> >> >> I'm hoping an AS version of the lineChart will allow a faster sampling >> rate? >> >> Problem is the AS chart does not display any data (just x and y axis) in >> the panel. >> This is my foray into charts in AS, so I'm assuming it's a binding >>issue? >> >> I have: >> >> * lineChart = new LineChart();* >> * lineSeries = new LineSeries();* >> >> * lineChart.dataProvider = zArrayColl; * >> * lineChart.percentWidth = 100;* >> * lineChart.percentHeight = 100;* >> * lineChart.x = 100;* >> * lineChart.y = 85;* >> * lineChart.showDataTips = true;* >> * lineSeries.xField = "myTime";* >> * lineSeries.yField = "zAccel";* >> >> * lineSeries.xField = "myTime";* >> * lineSeries.yField = "zAccel";* >> >> And in creationCompete: >> * BindingUtils.bindProperty(lineSeries,"text", zArrayColl, >> "text");* >> >> >> I'm not at all sure if this is the correct approach. >> If so, what the hell do I put in the "text" fields? >> >> Also, will this speed up the chart significantly? If not, any ideas on >>how >> to improve this to increase the sampling rate? >> >> Phew >> >> Well, help with this (ideas or specifics) would be greatly appreciated. >> >> Phil. >> >> >> -- >> Philip Medlam >> > > > >-- >Philip Medlam
