= WebKit Feature Focus for 2018-2019 =
''by Geoff Garen''

'''200 features planned'''

== Build ==

- XCBuild
- CMake
- ccache
- Precompiled headers

Focused on the build system and especially moving to unified build for 2x speed up

All non-Apple ports have moved to CMake, Apple still working on moving to CMake for build speed up

Interested in ccache by default
Precompiled headers

== JavaScriptCore ==

- New byte code format
    - No pointers
    - Load bytecode out of cache
    - The more we use process isolation the less hits in cache
- Node.js prototype
    - Participation helps standardization and performance testing
- JetStream 2

== Layout ==

- Next-Generation layout
    - Complete rewrite of the layout engine
    - Closer to spec language
    - A lot more efficient
    - Parallelize-able
    - Initial speed-up from initial design is already faster on its own
    - Right now it draws boxes
- LFC

== Web Standards ==

- Pointer Events
- New form controls
- Removing WebSQL
- Web Components Polish
- Intersection Observer (non-Apple dev, Google)
- WebShare API (done)
- Payment Request
- Font Color Palettes
- Web Animations (close to done)
- CSS logical properties (in-progress, going ok)
- Better text decorations
- CSS conic-gradient (done)
- Datalist <input type color>
- File upload enhancements
- WebAuthentication
- CSS @page
- CSS logical properties
- Unicode 12
- Implement CSS Text Module Level 4
- IndexedDB Quality

== Service Workers ==

- Long strange trip
- We did a great job at delivering high quality SW
- Not a lot of adoption of offline mode
- More interest in using Service Workers to make your website fast
    - But everyone knows it makes your site slower
    - It launches a separate process, and that takes time
- Then they try to pose new standards to make SW faster
- We need to focus on an effort to optimize SW
    - Merged the storage process into the network process
    - Now only have to launch the network process
    - First time startup is 250 ms faster
    - Doesn’t eliminate the launch of SW itself and XPC messaging
    - SW launch the sw in process
    - Any other tab will have to use the same SW, no cold start penalty, but still XPC overhead
- If the Network is really slow, SW may make it faster
    - Mobile specific
    - In countries with slow cell service, mobile devices, may be a big part of browsing
- Should we rename NetworkProcess?
    - Kinda… maybe?
    - LocalStorage is in the UIProcess
    - Payments?
        - NetworkProcess or their own process?
    - It’s possible it will be the generic helper process
    - HelperProcess, DoerProcess, DoallthethingsProcess

== WebRTC & getUserMedia ==

- Using it for tech or learning support system
- WebRTC h.264 simulcast (done)
- VP8 for WebRTC (the libwebrtc implementation)
- Fuller support for WebRTC 1.0 APIs
    - May break some sites
- Support mDNS ICE Candidates
    - New proposal for a standard for privately sharing your IP address
- VCP for WebRTC
- Screen capture
- MediaCapabilities API

== Security & Privacy ==

- Process per origin (PSON, frames) [it’s really process per site]
    - Process swap on navigation
    - Isolate frame content, hasn’t been designed it yet
- ITP 3.0
    - May create web compatibility concerns
    - New design patterns for sharing info
- Fingerprinting Mitigations 2.0
    - May create web compatibility concerns
    - New design patterns for sharing info
- Safe Browsing in WKWebView
- Fuzz-0 for JSC
    - Apple should take the action to Open-Source fuzzers
    - WebKit should run DOM fuzzers
        - Make available to WebKit Security Team
- Consider blocking third-party iframe redirects
    - Attack, ad in iframe top.locaiton.href sends to App Store or other page
        - Hard for web to protect itself from this
        - CSP protections available, no one understands or uses them
    - Other window or tab used to navigate to somewhere of attackers choosing (phishing page etc)
    - Prohibit like pop-up blocking
- Prevent navigation hijacking
- Sandbox Hardening 2.0
- Find and correct CSP Implementations
- CSP (Content Security Policy) level 3
- New content blocker action: insert stub

== Graphics & Media ==

- WebGPU
    - Improvement over GL designs
- WebGL 2
    - Because people use it
    - “It’s the best” - mmaxfield
- Modern EME
- Support codec and container switching in MSE
- AirPlay improvements
- Fullscreen quality
- Implement PiP JS API
- Autoplay API
    - API to determine if autoplay will succeed
    - If you can’t autoplay, you provide a button
    - Spec is in flux
    - Will discuss at TPAC
- HDR video

== Performance Defense ==

“A big part of being fast is not getting slow” - Geoff Garen

- PLT 5
- Performance regression defense coordination
- Throttled PLT (Page Load Test for iOS) - no regression
- PLT (macOS) - no regression
- Speedometer2 - no regression
- PLUM - no regression
- Membuster - no regression

== Performance Offense ==

- Opitimize “first meaningful paint”
- JS bytecode caching
- Match Lua memory usage on Lua JSFight
    - A lot of system services that take advantage of JS scripting
    - Fixed cost memory is too high
    - Excited to set a goal to be just as good as Lua
- JetStream 2 - 6% faster
- MotionMark - 5% faster
- Improve page loading performance on watchOS by 20%
- JetStream 2 - 20% faster
- RAMification - 30% less memory
- MotionMark - 10% faster
- 

== Scrolling ==

- Use async scrolling in overflow

== Web Inspector & WebDriver ==

- Handle big sites
- Modern architecture
- Medis debugging
- Multiple disjoint selection in grids and trees (cookies)
- Editing improvements in styles sidebar
- WebDriver for wkwebview 
- Tab UI refresh
- more…

== WebKit API ==

- UIWebView on top of WKEWebView
- Disable iOS WK1 WebThread
- Downloads
- More apps on Modern WebKit
- Enhanced editing APIs
- “One Network Process”
- Partition-aware website data API

== Infrastructure & Testing ==

- Improved EWS
- webkit.org improvement 2019
- Upgrade build.webkit.org to Buildbot 1.0
- iOS LayoutTest Cleanup
- API testing technical debt reduction