src/vs/workbench/contrib/performance/browser/perfviewEditor.ts/PerfModelContentProvider/_addRawPerfMarks
class PerfModelContentProvider:	private _addRawPerfMarks(md: MarkdownBuilder): void {

		for (const [source, marks] of this._timerService.getPerformanceMarks()) {
			md.heading(2, `Raw Perf Marks: ${source}`);
			md.value += '```\n';
			md.value += `Name\tTimestamp\tDelta\tTotal\n`;
			let lastStartTime = -1;
			let total = 0;
			for (const { name, startTime } of marks) {
				const delta = lastStartTime !== -1 ? startTime - lastStartTime : 0;
				total += delta;
				md.value += `${name}\t${startTime}\t${delta}\t${total}\n`;
				lastStartTime = startTime;
			}
			md.value += '```\n';
		}
	}