servo: the parallel web engine
DESCRIPTION
This talk exposes the reasons what Servo is and why it is necessary, its current status, future plans and details on the Rust programming language, which has a symbiotic relationship with Servo.TRANSCRIPT
Servo: The parallel web engine
Bruno de Oliveira Abinader
[email protected] [email protected]
FISL 15 | 2014 | Porto Alegre, Brasil
/whoami abinader @ irc.freenode.org | irc.mozilla.org | irc.w3.org
Ohloh: ohloh.net/accounts/brunoabinader
GitHub: github.com/brunoabinader
Blog: abinader.com.br
Introdução
• Scenario: Mobile web browsers
• What is Servo? What is Rust?
• Servo: Objectives
• Servo: Current status
• Servo: Challenges and future plans
• Contributing to Servo and Rust
Scenario: Mobile web browsers
Predictions for 2014 and beyond*:
• Web pages will grow in size and complexity
• Focus on mobile web browsers performance
• Devices will have more cores, not faster cores
Scenario: Mobile web browsers
Load time of a web page in Desktop vs. Mobile**:
Sources: http://www.webperformancetoday.com/2014/01/07/eight-web-performance-predictions-for-2014/ http://www.eecs.berkeley.edu/~lmeyerov/projects/pbrowser/pubfiles/playout.pdf
Scenario: Mobile web browsers
Slowness causes:
• Single-core mobile devices
• Browsers do not adapt to multi-core devices
• JavaScript code run in a single thread
Scenario: Mobile web browsers
Further issues:
• Huge code base: multiple architectures, multiple ports
• Support for deprecated platforms, specifications and architectures
• Security vulnerabilities on C++ memory management
What is Servo?
What is Servo?
document
html
head body
title p
DOM Example Hello World!
What is Servo?
Servo is an experimental web engine:
• Developed by Mozilla, in partnership with Samsung
• Aims to create a highly parallel and safe environment
• Focus on mobile and embedded
• Has symbiotic relationship with Rust programming language
What is Servo? Under the hood:
• SpiderMonkey JavaScript engine
• Azure drawing library, Skia, Cairo
• Hubbub HTML parser
• Harfbuzz text shaping library
What is Rust?
What is Rust? Rust is a programming language:
• Developed to be safe, concurrent and practical
• Focus on creation of reliable and efficient systems
• #2 on GitHub’s “repositories with most amount of closed issues” in 2013
What is Rust?
Example:
Servo: Objectives
• Advantage from parallelism in various levels
• Eliminate common causes for bugs and security flaws
• Based on WHATWG live specifications
Servo: Current status
We do ACID2!
Servo: Challenges
• Performance: Parallelism trade-offs
• Rust data structures
• Rust language immaturity
• Hostile libraries to parallelism and security controls
Servo: Challenges
Strategies for optimal parallelism:
Task-based architecture
Copy-on-write DOM
Parallel rendering
Tiled rendering
Layered rendering
Selector matching
Parallel layout
Text shaping
Parallel parsing
Image decoding
Other decodings (eg. Video)
GC JS in parallel with layout
Servo: Future plans
Roadmap for 2014:
• Demonstrate better performance than other web engines (eg. Gecko, WebKit, Blink, Trident)
• Implement all Servo architecture
ACID2 | Parallel layout | HTML parser in Rust | Bidirectional writing | Vertical writing | Gestures | XMLHTTPRequest |
Incremental layout | COW DOM | W3C Platform Tests | CSS WG tests | Android buildbot | Embedding | Pagination | CSSOM |
CSS Properties | DOM bindings | Caching | FlexBox | Web Animations | Multiprocess | Multimedia | Sandboxing | Addons
| Bookmarks | History | Cookies | …
Contributing to Servo and Rust
• Contributions are welcome!
• Servo: github.com/mozilla/servo
• Rust: github.com/mozilla/rust | rust-lang.org
• #servo | #rust | #rust-internals @ irc.mozilla.org
• dev-servo | rust-dev @ lists.mozilla.org
• Reviews: critic.hoppipolla.co.uk
• News: blog.octayn.net
Contributing to Servo and Rust
• Servo: Supported systems:
Contributing to Servo and Rust
• First good bugs list @ GitHub issues
• CSS properties
• DOM Bindings
• Janitoring
• Tests
• Documentation
Questions?
Thank you!
Special thanks: