Merge commit 'be3e8236086165e5e45a5a10783823874b3f3ebd' as 'lib/vscode'

lib/vscode/src/vs/base/common/performance.js

@@ -0,0 +1,96 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+//@ts-check
+
+function _factory(sharedObj) {
+
+	sharedObj.MonacoPerformanceMarks = sharedObj.MonacoPerformanceMarks || [];
+
+	const _dataLen = 2;
+	const _timeStamp = typeof console.timeStamp === 'function' ? console.timeStamp.bind(console) : () => { };
+
+	function importEntries(entries) {
+		sharedObj.MonacoPerformanceMarks.splice(0, 0, ...entries);
+	}
+
+	function exportEntries() {
+		return sharedObj.MonacoPerformanceMarks.slice(0);
+	}
+
+	function getEntries() {
+		const result = [];
+		const entries = sharedObj.MonacoPerformanceMarks;
+		for (let i = 0; i < entries.length; i += _dataLen) {
+			result.push({
+				name: entries[i],
+				startTime: entries[i + 1],
+			});
+		}
+		return result;
+	}
+
+	function getDuration(from, to) {
+		const entries = sharedObj.MonacoPerformanceMarks;
+		let target = to;
+		let endIndex = 0;
+		for (let i = entries.length - _dataLen; i >= 0; i -= _dataLen) {
+			if (entries[i] === target) {
+				if (target === to) {
+					// found `to` (end of interval)
+					endIndex = i;
+					target = from;
+				} else {
+					// found `from` (start of interval)
+					return entries[endIndex + 1] - entries[i + 1];
+				}
+			}
+		}
+		return 0;
+	}
+
+	function mark(name) {
+		sharedObj.MonacoPerformanceMarks.push(name, Date.now());
+		_timeStamp(name);
+	}
+
+	const exports = {
+		mark: mark,
+		getEntries: getEntries,
+		getDuration: getDuration,
+		importEntries: importEntries,
+		exportEntries: exportEntries
+	};
+
+	return exports;
+}
+
+// This module can be loaded in an amd and commonjs-context.
+// Because we want both instances to use the same perf-data
+// we store them globally
+
+// eslint-disable-next-line no-var
+var sharedObj;
+if (typeof global === 'object') {
+	// nodejs
+	sharedObj = global;
+} else if (typeof self === 'object') {
+	// browser
+	sharedObj = self;
+} else {
+	sharedObj = {};
+}
+
+if (typeof define === 'function') {
+	// amd
+	define([], function () { return _factory(sharedObj); });
+} else if (typeof module === 'object' && typeof module.exports === 'object') {
+	// commonjs
+	module.exports = _factory(sharedObj);
+} else {
+	sharedObj.perf = _factory(sharedObj);
+}