src/vs/workbench/services/timer/browser/timerService.ts/AbstractTimerService/setPerformanceMarks
class AbstractTimerService:	setPerformanceMarks(source: string, marks: perf.PerformanceMark[]): void {
		// Perf marks are a shared resource because anyone can generate them
		// and because of that we only accept marks that start with 'code/'
		this._marks.setMarks(source, marks.filter(mark => mark.name.startsWith('code/')));
	}