Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(41)

Unified Diff: tools/telemetry/telemetry/internal/browser/network_quiescence.js

Issue 1647513002: Delete tools/telemetry. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 11 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
Index: tools/telemetry/telemetry/internal/browser/network_quiescence.js
diff --git a/tools/telemetry/telemetry/internal/browser/network_quiescence.js b/tools/telemetry/telemetry/internal/browser/network_quiescence.js
deleted file mode 100644
index f317d6c1f1e1aa344157779af92273fc60a7d7ad..0000000000000000000000000000000000000000
--- a/tools/telemetry/telemetry/internal/browser/network_quiescence.js
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-'use strict';
-
-/**
- * @fileoverview This file provides a JavaScript helper function that
- * determines when network quiescence has been reached based on the time since
- * the last resource was received.
- */
-(function() {
-
- // Make executing this code idempotent.
- if (window.__telemetry_testHasReachedNetworkQuiescence) {
- return;
- }
-
- // Some benchmarks patch window.performance to make it deterministic.
- // Save the original performance object before it is patched.
- var real_performance = window.performance;
-
- // Set the Resource Timing interface functions that will be used below
- // to use whatever version is available currently regardless of vendor
- // prefix.
- real_performance.clearResourceTimings =
- (real_performance.clearResourceTimings ||
- real_performance.mozClearResourceTimings ||
- real_performance.msClearResourceTimings ||
- real_performance.oClearResourceTimings ||
- real_performance.webkitClearResourceTimings);
-
- real_performance.getEntriesByType =
- (real_performance.getEntriesByType ||
- real_performance.mozGetEntriesByType ||
- real_performance.msGetEntriesByType ||
- real_performance.oGetEntriesByType ||
- real_performance.webkitGetEntriesByType);
-
- // This variable will available to the function below and it will be
- // persistent across different function calls. It stores the last
- // entry in the list of PerformanceResourceTiming objects returned by
- // real_performance.getEntriesByType('resource').
- //
- // The reason for doing it this way is because the buffer for
- // PerformanceResourceTiming objects has a limit, and once it's full,
- // new entries are not added. We're only interested in the last entry,
- // so we can clear new entries when they're added.
- var lastEntry = null;
-
- // True when no resource has been loaded from the network for
- //|QUIESCENCE_TIMEOUT_MS| milliseconds. This value is sticky.
- var hasReachedQuiesence = false;
-
- // Time to wait before declaring network quiescence in milliseconds.
- var QUIESCENCE_TIMEOUT_MS = 2000;
-
- /**
- * This method uses the Resource Timing interface, which is described at
- * http://www.w3.org/TR/resource-timing/. It determines whether the time
- * since lodading any resources such as images and script files (including
- * resources requested via XMLHttpRequest) has exceeded a threshold defined
- # by |QUIESCENCE_TIMEOUT_MS|.
- *
- * @return {boolean} True if the time since either the load event, or the last
- * resource was received after the load event exceeds the aforementioned
- * threshold. This state is sticky, so once this function returns true for a
- * given page, it will always return true.
- */
- window.__telemetry_testHasReachedNetworkQuiescence = function() {
- if (hasReachedQuiesence) {
- return true;
- }
-
- if (window.document.readyState !== 'complete') {
- return false;
- }
-
- var resourceTimings = real_performance.getEntriesByType('resource');
- if (resourceTimings.length > 0) {
- lastEntry = resourceTimings.pop();
- real_performance.clearResourceTimings();
- }
-
- // The times for performance.now() and in the PerformanceResourceTiming
- // objects are all in milliseconds since performance.timing.navigationStart,
- // so we must also get load time in the same terms.
- var timing = real_performance.timing;
- var loadTime = timing.loadEventEnd - timing.navigationStart;
- var lastResponseTimeMs = 0;
-
- // If there have been no resource timing entries, or the last entry was
- // before the load event, then use the time since the load event.
- if (!lastEntry || lastEntry.responseEnd < loadTime) {
- lastResponseTimeMs = real_performance.now() - loadTime;
- } else {
- lastResponseTimeMs = real_performance.now() - lastEntry.responseEnd;
- }
-
- if (lastResponseTimeMs >= QUIESCENCE_TIMEOUT_MS) {
- hasReachedQuiesence = true;
- }
-
- return hasReachedQuiesence;
- }
-
-})();

Powered by Google App Engine
This is Rietveld 408576698