1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
const Cm = Components.manager;
Cm.QueryInterface(Ci.nsIServiceManager);
import { AppConstants } from "resource://gre/modules/AppConstants.sys.mjs";
import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
const lazy = {};
XPCOMUtils.defineLazyPreferenceGetter(
lazy,
"BROWSER_STARTUP_RECORD",
"browser.startup.record",
false
);
XPCOMUtils.defineLazyPreferenceGetter(
lazy,
"BROWSER_STARTUP_RECORD_IMAGES",
"browser.startup.recordImages",
false
);
let firstPaintNotification = "widget-first-paint";
// widget-first-paint fires much later than expected on Linux.
if (
AppConstants.platform == "linux" ||
Services.prefs.getBoolPref("browser.startup.preXulSkeletonUI", false)
) {
firstPaintNotification = "xul-window-visible";
}
let win, canvas;
let paints = [];
let afterPaintListener = () => {
let width, height;
canvas.width = width = win.innerWidth;
canvas.height = height = win.innerHeight;
if (width < 1 || height < 1) {
return;
}
let ctx = canvas.getContext("2d", { alpha: false, willReadFrequently: true });
ctx.drawWindow(
win,
0,
0,
width,
height,
"white",
ctx.DRAWWINDOW_DO_NOT_FLUSH |
ctx.DRAWWINDOW_DRAW_VIEW |
ctx.DRAWWINDOW_ASYNC_DECODE_IMAGES |
ctx.DRAWWINDOW_USE_WIDGET_LAYERS
);
paints.push({
data: ctx.getImageData(0, 0, width, height).data,
width,
height,
});
};
/**
* The StartupRecorder component observes notifications at various stages of
* startup and records the set of JS modules that were already loaded at
* each of these points.
* The records are meant to be used by startup tests in
* browser/base/content/test/performance
* This component only exists in nightly and debug builds, it doesn't ship in
* our release builds.
*/
export function StartupRecorder() {
this.wrappedJSObject = this;
this.data = {
images: {
"image-drawing": new Set(),
"image-loading": new Set(),
},
code: {},
extras: {},
prefStats: {},
};
this.done = new Promise(resolve => {
this._resolve = resolve;
});
}
StartupRecorder.prototype = {
QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
record(name) {
ChromeUtils.addProfilerMarker("startupRecorder:" + name);
this.data.code[name] = {
modules: Cu.loadedJSModules.concat(Cu.loadedESModules),
services: Object.keys(Cc).filter(c => {
try {
return Cm.isServiceInstantiatedByContractID(c, Ci.nsISupports);
} catch (e) {
return false;
}
}),
};
this.data.extras[name] = {
hiddenWindowLoaded: Services.appShell.hasHiddenWindow,
};
},
observe(subject, topic, data) {
if (topic == "app-startup" || topic == "content-process-ready-for-script") {
// Don't do anything in xpcshell.
if (Services.appinfo.ID != "{ec8030f7-c20a-464f-9b0e-13a3a9e97384}") {
return;
}
if (!lazy.BROWSER_STARTUP_RECORD && !lazy.BROWSER_STARTUP_RECORD_IMAGES) {
this._resolve();
this._resolve = null;
return;
}
// We can't ensure our observer will be called first or last, so the list of
// topics we observe here should avoid the topics used to trigger things
// during startup (eg. the topics observed by BrowserGlue.sys.mjs).
let topics = [
"profile-do-change", // This catches stuff loaded during app-startup
"toplevel-window-ready", // Catches stuff from final-ui-startup
firstPaintNotification,
"sessionstore-windows-restored",
"browser-startup-idle-tasks-finished",
];
if (lazy.BROWSER_STARTUP_RECORD_IMAGES) {
// For code simplicify, recording images excludes the other startup
// recorder behaviors, so we can observe only the image topics.
topics = [
"image-loading",
"image-drawing",
"browser-startup-idle-tasks-finished",
];
}
for (let t of topics) {
Services.obs.addObserver(this, t);
}
return;
}
// We only care about the first paint notification for browser windows, and
// not other types (for example, the gfx sanity test window)
if (topic == firstPaintNotification) {
// In the case we're handling xul-window-visible, we'll have been handed
// an nsIAppWindow instead of an nsIDOMWindow.
if (subject instanceof Ci.nsIAppWindow) {
subject = subject
.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindow);
}
if (
subject.document.documentElement.getAttribute("windowtype") !=
"navigator:browser"
) {
return;
}
}
if (topic == "image-drawing" || topic == "image-loading") {
this.data.images[topic].add(data);
return;
}
Services.obs.removeObserver(this, topic);
if (topic == firstPaintNotification) {
// Because of the check for navigator:browser we made earlier, we know
// that if we got here, then the subject must be the first browser window.
win = subject;
canvas = win.document.createElementNS(
"http://www.w3.org/1999/xhtml",
"canvas"
);
canvas.mozOpaque = true;
afterPaintListener();
win.addEventListener("MozAfterPaint", afterPaintListener);
}
if (topic == "sessionstore-windows-restored") {
// We use idleDispatchToMainThread here to record the set of
// loaded scripts after we are fully done with startup and ready
// to react to user events.
Services.tm.dispatchToMainThread(
this.record.bind(this, "before handling user events")
);
} else if (topic == "browser-startup-idle-tasks-finished") {
if (lazy.BROWSER_STARTUP_RECORD_IMAGES) {
Services.obs.removeObserver(this, "image-drawing");
Services.obs.removeObserver(this, "image-loading");
this._resolve();
this._resolve = null;
return;
}
this.record("before becoming idle");
win.removeEventListener("MozAfterPaint", afterPaintListener);
win = null;
this.data.frames = paints;
this.data.prefStats = {};
if (AppConstants.DEBUG) {
Services.prefs.readStats(
(key, value) => (this.data.prefStats[key] = value)
);
}
paints = null;
if (!Services.env.exists("MOZ_PROFILER_STARTUP_PERFORMANCE_TEST")) {
this._resolve();
this._resolve = null;
return;
}
Services.profiler.getProfileDataAsync().then(profileData => {
this.data.profile = profileData;
// There's no equivalent StartProfiler call in this file because the
// profiler is started using the MOZ_PROFILER_STARTUP environment
// variable in browser/base/content/test/performance/browser.ini
Services.profiler.StopProfiler();
this._resolve();
this._resolve = null;
});
} else {
const topicsToNames = {
"profile-do-change": "before profile selection",
"toplevel-window-ready": "before opening first browser window",
};
topicsToNames[firstPaintNotification] = "before first paint";
this.record(topicsToNames[topic]);
}
},
};
|
