let files.watcherExclude be an object like other exclude settings

src/vs/platform/files/common/files.ts

@@ -429,7 +429,7 @@ export interface IFilesConfiguration {
 	files: {
 		associations: { [filepattern: string]: string };
 		exclude: glob.IExpression;
-		watcherExclude: string[];
+		watcherExclude: { [filepattern: string]: boolean };
 		encoding: string;
 		trimTrailingWhitespace: boolean;
 		autoSave: string;

src/vs/workbench/parts/files/browser/files.contribution.ts

@@ -229,11 +229,8 @@ configurationRegistry.registerConfiguration({
 			'description': nls.localize('autoSaveDelay', "Controls the delay in ms after which a dirty file is saved automatically. Only applies when \"files.autoSave\" is set to \"{0}\"", AutoSaveConfiguration.AFTER_DELAY)
 		},
 		'files.watcherExclude': {
-			'type': 'array',
-			'items': {
-				'type': 'string'
-			},
-			'default': platform.isLinux ? ['**/.git/objects/**', '**/node_modules/**'] : ['**/.git/objects/**'],
+			'type': 'object',
+			'default': platform.isLinux ? { '**/.git/objects/**': true, '**/node_modules/**': true } : { '**/.git/objects/**': true },
 			'description': nls.localize('watcherExclude', "Configure glob patterns of file paths to exclude from file watching. Changing this setting requires a restart. When you experience Code consuming lots of cpu time on startup, you can exclude large folders to reduce the initial load.")
 		}
 	}

src/vs/workbench/services/files/electron-browser/fileService.ts

@@ -43,12 +43,17 @@ export class FileService implements files.IFileService {
 				encodingOverride.push({ resource: uri.file(paths.join(this.contextService.getWorkspace().resource.fsPath, '.vscode')), encoding: encoding.UTF8 });
 			}
 
+			let watcherIgnoredPatterns:string[] = [];
+			if (configuration.files && configuration.files.watcherExclude) {
+				watcherIgnoredPatterns = Object.keys(configuration.files.watcherExclude).filter(k => !!configuration.files.watcherExclude[k]);
+			}
+
 			// build config
 			let fileServiceConfig: IFileServiceOptions = {
 				errorLogger: (msg: string) => errors.onUnexpectedError(msg),
 				encoding: configuration.files && configuration.files.encoding,
 				encodingOverride: encodingOverride,
-				watcherIgnoredPatterns: configuration.files && configuration.files.watcherExclude || [],
+				watcherIgnoredPatterns: watcherIgnoredPatterns,
 				verboseLogging: this.contextService.getConfiguration().env.verboseLogging
 			};