Calling ReactDefaultPerf.printWasted() results in:
Uncaught TypeError: Cannot read property 'forEach' of undefined
writes.(anonymous function).forEach @ ReactDefaultPerfAnalysis.js:195
Object.keys.forEach @ ReactDefaultPerfAnalysis.js:192
getUnchangedComponents @ ReactDefaultPerfAnalysis.js:191
getInclusiveSummary @ ReactDefaultPerfAnalysis.js:139
ReactDefaultPerf.getMeasurementsSummaryMap @ ReactDefaultPerf.js:118
ReactDefaultPerf.printWasted @ ReactDefaultPerf.js:133
(this is on a page internally at Facebook so I assume it's a fairly recent React version)
Calling
ReactDefaultPerf.printWasted()results in:(this is on a page internally at Facebook so I assume it's a fairly recent React version)