Usagefusioncharts

CompanyConfidential2008NokiaV1-Filename.
ppt/YYYY-MM-DD/Initials1PerformanceJSAPIswebkitAfterPaintSlightlymodifiedversionofmozAfterPaintmoduleevents{interface[GenerateConstructor,]WebKitAfterPaintEvent:Event{readonlyattributeunsignedshortpaintTime;readonlyattribute[CustomGetter]ArrayclientRects;};}strictlyfortestingpurposeseventfiresatthedocumentandbubblesuptothewindowoffers2attributespaintTime–howlongtheframetakestopaint(notwebcoreframe,videoframe)clientRects–arrayofrectanglesarebeingpaintedUsagewindow.
addEventListener("webkitAfterPaint",log,false);functionlog(e){store.
push([e.
paintTime,e.
clientRects]);}window.
removeEventListener("webkitAfterPaint",log,false);resultisinstrorevarCompanyConfidential2008NokiaV1-Filename.
ppt/YYYY-MM-DD/Initials2CompanyConfidentialPerformanceJSAPIsconti.
FPSmeasurementProfilerenderingspeedonWebCorelevel.
modulewindow{interfaceConsole{.
.
.
voidstartPaintPerformanceMeasure();unsignedshortstopPaintPerformanceMeasure();.
.
.
}}Useagewindow.
console.
startPaintPerformanceMeasure();document.
getElementById("fpscounter").
innerHTML="fps:"+window.
console.
stopPaintPerformanceMeasure();MeasuringstartswhenthefirstpainteventoccursaftercallingstartPatinPefromanceMeasure()andendsonthelastpainteventbeforestopPaintPerfromanceMeasure()getscalled.
FPScountingcouldbedoingusingwebkitAfterPaintaswell,butbubblingeventsoneachpaintframecouldimpactthefpsnumber.
2008NokiaV1-Filename.
ppt/YYYY-MM-DD/Initials3CompanyConfidentialPerformanceJSAPIscontinuteWebTimingAPI–nextthingtodo.
Thisismainlyquotingfromthelinkbelow.
http://dev.
w3.
org/2006/webapi/WebTiming/UserlatencyisanimportantqualitybenchmarkforWebApps.
WhileJavaScript-basedmechanismscanprovidecomprehensiveinstrumentationsforuserlatencymeasurementswithinanapplication,inmanycases,theyareunabletoprovideacompleteend-to-endlatencypicture.
Forexample,thefollowingJavascriptshowsthetimeittaketofullyloadapage:varstart=newDate().
getTime();functiononLoad(){varnow=newDate().
getTime();varlatency=now-start;alert("pageloadingtime:"+latency);}ThescriptcalculatesthetimeittakestoloadthepageafterthefirstbitofJavaScriptintheheadisexecuted,butitdoesnotgiveanyinformationaboutthetimeittakestogetthepagefromtheserver.
ThisWebTiminginterfaceallowsJStoprovidecompleteclient-sidelatencymeasurementswithinapplications.
Withtheproposedinterface,thepreviousexamplecouldbemodifiedtoprovideinformationaboutuser'sperceivedpageloadtime.
Thefollowingscriptcalculateshowmuchtimehaselapsedsincetheoccuranceofanavigationevent,suchasthemouseclickonalink.
functiononLoad(){varnow=newDate().
getTime();varlatency=now-window.
pageTiming.
navigationTime;alert("User-perceivedpageloadingtime:"+latency)}2008NokiaV1-Filename.
ppt/YYYY-MM-DD/Initials4