{"ScriptPreparationCode":"let start = null;\r\nlet end = null;","TestCases":[{"Name":"Date.now()","Code":"start = Date.now();\r\nend = Date.now();","IsDeferred":false},{"Name":"new Date().getTime();","Code":"start = new Date().getTime();\r\nend = new Date().getTime();","IsDeferred":false},{"Name":"performance.now()","Code":"start = performance.now()\r\nend = performance.now()","IsDeferred":false},{"Name":"performance.measure","Code":"performance.mark(\u0027start\u0027)\r\nstart = Date.now()\r\nconst { duration } = performance.measure(\u0027span\u0027, \u0027start\u0027)\r\nend = start \u002B duration","IsDeferred":false}]}