TypeError: Must specify one of entryTypes or type
TypeError: Cannot specify type or buffered if entryTypes is specified
TypeError: Cannot specify type or buffered if entryTypes is specified
InvalidModificationError: Cannot change a PerformanceObserver from observing multiple types to observing a single type
observer === globalObserver: true
list instanceof PerformanceObserverEntryList: true
allEntries instanceof Array: true
allEntries.length === 3: true
allEntries[0] === startMark: true
allEntries[1] === measureMark: true
allEntries[2] === endMark: true
markEntries instanceof Array: true
markEntries.length === 2: true
markEntries[0] === startMark: true
markEntries[1] === endMark: true
measureEntries instanceof Array: true
measureEntries.length === 1: true
measureEntries[0] === measureMark: true
startEntries instanceof Array: true
startEntries.length === 1: true
startEntries[0] === startMark: true
endEntries instanceof Array: true
endEntries.length === 1: true
endEntries[0] === endMark: true
measureEntriesByName instanceof Array: true
measureEntriesByName.length === 1: true
measureEntriesByName[0] === measureMark: true
records.length === 0: true
