Could you also please request the various Privacy, Security, Enterprise,
etc. bits in your Chromestatus entry?
On 10/1/24 5:31 AM, Yoav Weiss (@Shopify) wrote:
Thanks for working on this! This is super interesting!!
On Monday, September 30, 2024 at 4:12:25 PM UTC+2 Marja Hölttä wrote:
(Sending this I2S as recommended by API owners, to continue the
discussion about shipping this feature.)
Contact emailsma...@google.com, lesz...@google.com
<mailto:lesz...@google.com>
Explainerhttps://github.com/explainers-by-googlers/explicit-javascript-compile-hints-file-based/blob/main/README.md
<https://github.com/explainers-by-googlers/explicit-javascript-compile-hints-file-based/blob/main/README.md>
Specificationhttps://explainers-by-googlers.github.io/explicit-javascript-compile-hints-file-based
<https://explainers-by-googlers.github.io/explicit-javascript-compile-hints-file-based>
We don't typically ship features with specs on personal or
Google-owned repos.
I think it would be good to try and move this to an incubation venue
(e.g. WICG).
This would be a better place from an IPR perspective (i.e. allow
contributions outside of Google), and will help us validate that this
is something that has at least some industry support.
Summary
Allow attaching information about which functions should be eager
parsed & compiled in JavaScript files. The information will be
encoded as magic comments. We'll first target launching the
file-based explicit compile hints, and as a follow up, investigate
selecting individual functions for eager compilation.
Blink componentBlink>JavaScript
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EJavaScript>
TAG review
Did you file for a TAG review?
TAG review statusPending
Chromium Trial NameJavaScriptCompileHintsMagic
Link to origin trial feedback
summaryhttps://google.qualtrics.com/jfe/form/SV_9SLyOGnTj2cwo0C
<https://google.qualtrics.com/jfe/form/SV_9SLyOGnTj2cwo0C>
Origin Trial documentation
linkhttps://docs.google.com/document/d/19xTAM4A75tz0xUq_velMzGA4JHEgXpyflUxXTcuNiyE/edit?usp=sharing
<https://docs.google.com/document/d/19xTAM4A75tz0xUq_velMzGA4JHEgXpyflUxXTcuNiyE/edit?usp=sharing>
Risks
Interoperability and Compatibility
No interoperability / compatibility risks. Other browsers are
likely to ignore the hints if they perceive they cannot benefit
from them. Ignoring the hint is allowed behavior. We plan to make
the hints generic though, so that other browsers can later start
to support them too, e.g., if they implement background parsing /
compilation.
/Gecko/: N/A
(https://github.com/mozilla/standards-positions/issues/780
<https://github.com/mozilla/standards-positions/issues/780>)
/WebKit/: N/A
(https://github.com/WebKit/standards-positions/issues/172
<https://github.com/WebKit/standards-positions/issues/172>)
/Web developers/: Positive Positive signals from partners who want
to use compile hints to eager-compile core JS files.
/Other signals/:
WebView application risks
Does this intent deprecate or change behavior of existing APIs,
such that it has potentially high risk for Android WebView-based
applications?
Debuggability
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?Yes
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?No
The feature doesn't trigger any functional changes and cannot be
tested by WPT.
Flag name on chrome://flags
Finch feature nameNone
I *think* you can put JavaScriptCompileHintsMagicRuntime
<https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/platform/runtime_enabled_features.json5;l=2462?q=JavaScriptCompileHintsMagic%20-f:out&ss=chromium&start=11> as
the feature name.
Non-finch justificationNone
Requires code in //chrome?False
Tracking bughttps://bugs.chromium.org/p/v8/issues/detail?id=13917
<https://bugs.chromium.org/p/v8/issues/detail?id=13917>
Estimated milestonesOrigin trial desktop first115Origin trial
desktop last117Origin trial extension 1 end milestone131
Anticipated spec changes
Open questions about a feature may be a source of future web
compat or interop issues. Please list open issues (e.g. links to
known github issues in the project for the feature specification)
whose resolution may introduce web compat/interop risk (e.g.,
changing to naming or structure of the API in a
non-backward-compatible way).
Link to entry on the Chrome Platform
Statushttps://chromestatus.com/feature/5100466238652416?gate=5172761812533248
<https://chromestatus.com/feature/5100466238652416?gate=5172761812533248>
Links to previous Intent discussionsIntent to Experiment:
https://groups.google.com/a/chromium.org/g/blink-dev/c/BmN1Wus8V1s/m/3L2uU-wGAgAJ
<https://groups.google.com/a/chromium.org/g/blink-dev/c/BmN1Wus8V1s/m/3L2uU-wGAgAJ>
Intent to Extend Experiment 1:
https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/mwZYYTBJ12g/m/HWsRCkuxAQAJ
<https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/mwZYYTBJ12g/m/HWsRCkuxAQAJ>
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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