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1、UsingWebPageTestWebPerformanceTestingforNovicesandPowerUsersRickViscomi,AndyDavies,andMarcelDuranUsingWebPageTestbyRickViscomi,AndyDavies,andMarcelDuranCopyright©2016RickViscomi,AndyDavies,andMarcelDuran.Allrightsreserved.PrintedintheUnitedStatesofAmerica.Publi
2、shedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Reillybooksmaybepurchasedforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://safaribooksonline.com).Formoreinformation,contactourcorporate/ins
3、titutionalsalesdepartment:800-998-9938orcorporate@oreilly.com.Editors:CourtneyNashandBrianAndersonProductionEditor:ShinyKalapurakkelCopyeditor:GillianMcGarveyProofreader:EileenCohenIndexer:WendyCatalanoInteriorDesigner:DavidFutatoCoverDesigner:KarenMontgomeryIl
4、lustrator:RebeccaDemarestOctober2015:FirstEditionRevisionHistoryfortheFirstEdition2015-10-09:FirstReleaseSeehttp://oreilly.com/catalog/errata.csp?isbn=9781491902592forreleasedetails.TheO’ReillylogoisaregisteredtrademarkofO’ReillyMedia,Inc.UsingWebPageTest,theco
5、verimage,andrelatedtradedressaretrademarksofO’ReillyMedia,Inc.Whilethepublisherandtheauthorshaveusedgoodfaitheffortstoensurethattheinformationandinstructionscontainedinthisworkareaccurate,thepublisherandtheauthorsdisclaimallresponsibilityforerrorsoromissions,in
6、cludingwithoutlimitationresponsibilityfordamagesresultingfromtheuseoforrelianceonthiswork.Useoftheinformationandinstructionscontainedinthisworkisatyourownrisk.Ifanycodesamplesorothertechnologythisworkcontainsordescribesissubjecttoopensourcelicensesortheintellec
7、tualpropertyrightsofothers,itisyourresponsibilitytoensurethatyourusethereofcomplieswithsuchlicensesand/orrights.978-1-491-90259-2[LSI]ForewordIhavemanytoolsinmywebperformancetoolkit.ChromeDevToolsismygotoforinbrowserperformanceanalysis.IusethePageSpeedInsightsa
8、ndYSlowextensionsforconvertingperformanceobservationsintoactions.Ilovebookmarklets,especiallyfordoingperformanceanalysisinmobilebrowsers.ThewebsitesIrunaremonitoredusingseve
