DevTools/Performance: Difference between revisions

Revision as of 18:13, 20 September 2016

Team

Current Team	fitzgen, gregtatum
Previous Members	jsantell, vporof (moved to Project Tofino, but are still available for questions)
Product Management
SpiderMonkey Liason	shu
Gecko Layout Liason
Mailing Group	dev-developer-tools

Meetings

Meetings	Time, Timezone, Location
Weekly Updates	There are currently no weekly meetings.

Overview

DevTools' Performance Tools are a set of tools designed to identify, locate and resolve jank and responsiveness issues in web applications, FxOS apps, and Firefox itself. There are currently three main views for inspecting sampling and marker data (waterfall, call tree, flame chart).

Some experimental views are currently available optionally, such as allocation views, and the JIT Optimizations view.

Goals

Provide insight to issues related to performance in web applications
Offer guidance and suggestions on fixing performance problem areas
Approach feature parity with Gecko Profiler for layout, rendering issues (meta bug)
A consolidated area for any team on Gecko to implement their own view to solve specific performance issues

Internals

There are two main sets of data used in a recording profile -- marker data and profiler data.

Profiler data is the same information as the previous Profiler tool and that the Gecko Profiler uses. This samples the JS executing at a specified rate, and also returns painting, layout and marker data that currently only the Gecko Profiler uses. This tool only uses the sampling information, which lets us calculate cost and timing of functions in JS, as well as what JIT optimizations were used for JS.

Marker data is currently based on ProfileTimelineMarkers. Gecko Profiler uses the underlying profiler to generate markers, whereas Performance Tools uses these ProfileTimelineMarkers, which are emitted via docshell in realtime, rather than fetched on demand. The FxOS Performance team uses the same marker information from User Timing APIs, which this tool should most likely strive for.

These two data sources are merged together in a final recording, with waterfall view using marker data, and the call tree and flame graph using profiler data. We also use Debugger.Memory information to collect allocation information to track down instances where allocation pressure causes jank.

Initiatives

JIT Optimizations view
Operation Instrument (meta bug)
Extensible Performance Tools
Collaborate with FxOS Performance Task Force
Collaborate with Gecko Profiler team

Bugzilla

Helpful Bug Searches

Search	Description
Meta Bugs	The top-level bugs that are a good starting place to see what work needs to get done. Dependent bugs are set to block these meta bugs.
Good First Bugs	Looking for a place to start contributing? Pick up one of these bugs.
All Open Bugs	All of the bugs open on the tool.
Priority P1	The most important bugs being actively worked on.
Priority P2	Important bugs that need to get done soon.
Priority P3	The backlog of work to do.
Untriaged Bugs	New bugs that haven't been marked P1, P2, or P3.
Intermittents	Bugs filed on intermittent test failures. It's helpful to look them up on Orange Factor to see how often they are failing.

Meta Bugs

Title	Meta Bug	All Dependent Bugs	P1
React Templating	Bug 1258642	List all dependent bugs	Yes
JIT View	Bug 1143804	List all dependent bugs	Yes
Overview Timeline	Bug 1147941	List all dependent bugs
Call Tree Views	Bug 1147936	List all dependent bugs
Flame Views	Bug 1169877	List all dependent bugs
Waterfall View	Bug 1159048	List all dependent bugs
Allocation Views	Bug 1160812	List all dependent bugs
Perf Tools Performance	Bug 1160330	List all dependent bugs
Performance Tools Memory Footprint	Bug 1191797	List all dependent bugs
Gecko Profiler parity	Bug 1176608	List all dependent bugs
console.profile	Bug 1173555	List all dependent bugs
Operation Instrument	Bug 1145271	List all dependent bugs
Performance Tool Allocations	Bug 1160812	List all dependent bugs
Gaming/Web VR enhancements	Bug 1196984	List all dependent bugs
Extensible Performance Tools	Bug 1173449	List all dependent bugs
Active Intermittents	Bug 1245886	List all dependent bugs
Remote Profiling (WebIDE)	Bug 1199284	List all dependent bugs
UI/UX Papercuts	Bug 1145697	List all dependent bugs

@@ Line 56: / Line 56: @@
 * Collaborate with Gecko Profiler team
-== Meta Bugs ==
+== Bugzilla ==
-* [https://bugzilla.mozilla.org/buglist.cgi?component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox&bug_status=__open__&list_id=12341891 All Bugs]
+=== Helpful Bug Searches ===
-* [https://bugzilla.mozilla.org/show_bug.cgi?id=1147941 Overview Timeline]
+{| class="wikitable"
-* [https://bugzilla.mozilla.org/show_bug.cgi?id=1147936 Call Tree Views]
+|-
-* [https://bugzilla.mozilla.org/show_bug.cgi?id=1169877 Flame Views]
+! Search
-* [https://bugzilla.mozilla.org/show_bug.cgi?id=1159048 Waterfall View]
+! Description
-* [https://bugzilla.mozilla.org/show_bug.cgi?id=1160812 Allocation Views]
+|-
-* [https://bugzilla.mozilla.org/show_bug.cgi?id=1160330 Perf Tools Performance]
+| [https://bugzilla.mozilla.org/buglist.cgi?short_desc=%5Bmeta%5D&resolution=---&query_format=advanced&short_desc_type=allwordssubstr&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox Meta Bugs]
+| The top-level bugs that are a good starting place to see what work needs to get done. Dependent bugs are set to block these meta bugs.
+|-
+| [https://bugzilla.mozilla.org/buglist.cgi?keywords=good-first-bug%2C%20&keywords_type=allwords&list_id=13224534&known_name=perf&resolution=---&query_based_on=perf&query_format=advanced&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox Good First Bugs]
+| Looking for a place to start contributing? Pick up one of these bugs.
+|-
+| [https://bugzilla.mozilla.org/buglist.cgi?component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox&bug_status=__open__&list_id=12341891 All Open Bugs]
+| All of the bugs open on the tool.
+|-
+| [https://bugzilla.mozilla.org/buglist.cgi?f1=priority&short_desc=%5C%5Bmeta%5C%5D&o1=equals&resolution=---&query_format=advanced&short_desc_type=notregexp&v1=P1&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox Priority P1]
+| The most important bugs being actively worked on.
+|-
+| [https://bugzilla.mozilla.org/buglist.cgi?f1=priority&short_desc=%5C%5Bmeta%5C%5D&o1=equals&resolution=---&query_format=advanced&short_desc_type=notregexp&v1=P2&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox Priority P2]
+| Important bugs that need to get done soon.
+|-
+| [https://bugzilla.mozilla.org/buglist.cgi?f1=priority&short_desc=%5C%5Bmeta%5C%5D&o1=equals&resolution=---&query_format=advanced&short_desc_type=notregexp&v1=P3&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox Priority P3]
+| The backlog of work to do.
+|-
+| [https://bugzilla.mozilla.org/buglist.cgi?chfield=%5BBug%20creation%5D&chfieldfrom=2016-01-01&priority=--&resolution=---&classification=Client%20Software&chfieldto=Now&query_format=advanced&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox Untriaged Bugs]
+| New bugs that haven't been marked P1, P2, or P3.
+|-
+| [https://bugzilla.mozilla.org/buglist.cgi?keywords=intermittent-failure%2C%20&keywords_type=allwords&resolution=---&query_format=advanced&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox Intermittents]
+| Bugs filed on intermittent test failures. It's helpful to look them up on [https://brasstacks.mozilla.com/orangefactor/ Orange Factor] to see how often they are failing.
+|}
+=== Meta Bugs ===
+{| class="wikitable"
+|-
+! Title
+! Meta Bug
+! All Dependent Bugs
+! P1
+|-
+| React Templating
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1258642 Bug 1258642]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1258642&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+| Yes
+|-
+| JIT View
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1143804 Bug 1143804]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1143804&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+| Yes
+|-
+| Overview Timeline
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1147941 Bug 1147941]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1147941&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Call Tree Views
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1147936 Bug 1147936]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1147936&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Flame Views
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1169877 Bug 1169877]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1169877&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Waterfall View
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1159048 Bug 1159048]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1159048&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Allocation Views
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1160812 Bug 1160812]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1160812&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Perf Tools Performance
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1160330 Bug 1160330]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1160330&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Performance Tools Memory Footprint
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1191797 Bug 1191797]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1191797&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Gecko Profiler parity
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1176608 Bug 1176608]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1176608&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| console.profile
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1173555 Bug 1173555]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1173555&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Operation Instrument
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1145271 Bug 1145271]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1145271&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Performance Tool Allocations
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1160812 Bug 1160812]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1160812&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Gaming/Web VR enhancements
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1196984 Bug 1196984]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1196984&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Extensible Performance Tools
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1173449 Bug 1173449]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1173449&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Active Intermittents
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1245886 Bug 1245886]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1245886&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| Remote Profiling (WebIDE)
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1199284 Bug 1199284]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1199284&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|-
+| UI/UX Papercuts
+| [https://bugzilla.mozilla.org/show_bug.cgi?id=1145697 Bug 1145697]
+| [https://bugzilla.mozilla.org/buglist.cgi?o2=substring&v2=1145697&resolution=---&query_format=advanced&f2=blocked&component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&product=Firefox List all dependent bugs]
+|
+|}
 == Resources ==