perf - add marks for loading the main-process bundle

src/main.js

@@ -106,7 +106,10 @@ function onReady() {
 				process.env['VSCODE_NODE_CACHED_DATA_DIR'] = cachedDataDir || '';
 
 				// Load main in AMD
-				require('./bootstrap-amd').load('vs/code/electron-main/main');
+				perf.mark('willLoadMainBundle');
+				require('./bootstrap-amd').load('vs/code/electron-main/main', () => {
+					perf.mark('didLoadMainBundle');
+				});
 			};
 
 			// We recevied a valid nlsConfig from a user defined locale

src/vs/workbench/parts/performance/electron-browser/perfviewEditor.ts

@@ -141,6 +141,7 @@ class PerfModelContentProvider implements ITextModelContentProvider {
 		const table: (string | number)[][] = [];
 		table.push(['start => app.isReady', metrics.timers.ellapsedAppReady, '[main]', `initial startup: ${metrics.initialStartup}`]);
 		table.push(['nls:start => nls:end', metrics.timers.ellapsedNlsGeneration, '[main]', `initial startup: ${metrics.initialStartup}`]);
+		table.push(['require(main.bundle.js)', metrics.initialStartup ? perf.getDuration('willLoadMainBundle', 'didLoadMainBundle') : undefined, '[main]', `initial startup: ${metrics.initialStartup}`]);
 		table.push(['app.isReady => window.loadUrl()', metrics.timers.ellapsedWindowLoad, '[main]', `initial startup: ${metrics.initialStartup}`]);
 		table.push(['require & init global storage', metrics.timers.ellapsedGlobalStorageInitMain, '[main]', `initial startup: ${metrics.initialStartup}`]);
 		table.push(['window.loadUrl() => begin to require(workbench.main.js)', metrics.timers.ellapsedWindowLoadToRequire, '[main->renderer]', StartupKindToString(metrics.windowKind)]);