Warm up font info cache before creating lots of dom elements

src/vs/editor/browser/config/configuration.ts

@@ -42,6 +42,10 @@ class CSSBasedConfigurationCache {
 	}
 }
 
+export function readFontInfo(bareFontInfo: BareFontInfo): FontInfo {
+	return CSSBasedConfiguration.INSTANCE.readConfiguration(bareFontInfo);
+}
+
 class CSSBasedConfiguration extends Disposable {
 
 	public static INSTANCE = new CSSBasedConfiguration();

src/vs/workbench/electron-browser/shell.ts

@@ -93,6 +93,8 @@ import { ITimerService } from 'vs/workbench/services/timer/common/timerService';
 import { remote } from 'electron';
 import { ITextMateService } from 'vs/editor/node/textMate/textMateService';
 import { MainProcessTextMateSyntax } from 'vs/editor/electron-browser/textMate/TMSyntax';
+import { BareFontInfo } from 'vs/editor/common/config/fontInfo';
+import { readFontInfo } from 'vs/editor/browser/config/configuration';
 import 'vs/platform/opener/browser/opener.contribution';
 
 /**
@@ -382,6 +384,9 @@ export class WorkbenchShell {
 			this.onUnexpectedError(error);
 		});
 
+		// Warm up font cache information before building up too many dom elements
+		readFontInfo(BareFontInfo.createFromRawSettings(this.configurationService.getConfiguration('editor')));
+
 		// Shell Class for CSS Scoping
 		$(this.container).addClass('monaco-shell');