On 3/5/24 6:57 AM, Mandy, Arnaud wrote:
Contact emails
kenneth.r.christian...@intel.com, arnaud.ma...@intel.com,
wei4.w...@intel.com, raphael.kubo.da.co...@intel.com
Explainer
https://github.com/w3c/compute-pressure/blob/main/README.md
Specification
https://www.w3.org/TR/compute-pressure
Summary
The Compute Pressure API offers high-level states that represent the
pressure on the system. It allows the implementation to use underlying
hardware/platform metrics to inform the API users of possible stress
(high CPU load at the moment) on the system and consequently take the
corrective actions needed.
“Pressure” is a generic term by design – at the moment it is
calculated based on CPU load, but future plans include using signals
from temperature and battery status, for example.
https://developer.chrome.com/docs/web-platform/compute-pressure/
Blink component
Blink>PerformanceAPIs>ComputePressure
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EPerformanceAPIs%3EComputePressure>
Search tags
compute pressure
<https://chromestatus.com/features#tags:compute%20pressure>
TAG review
spec review: https://github.com/w3ctag/design-reviews/issues/795
wide review tracker: https://github.com/w3c/compute-pressure/issues/177
TAG review status
Issues addressed
Chromium Trial Name
ComputePressure
Origin Trial documentation link
https://developer.chrome.com/docs/web-platform/compute-pressure/
Origin Trials history
The first Origin Trial
<https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/HzVV-sM97T0/m/3pQ311KHAAAJ> was
run between M92-94.
The Compute Pressure API was widely redesigned after this OT to
resemble existing observer-based web APIs and also to provide better
privacy and security guarantees after discussions with PING.
The second Origin Trial
<https://groups.google.com/a/chromium.org/g/blink-dev/c/QfJ4pngu3gc> took
place during M115-M120.
During this origin trial we realized that the full capacity of the API
couldn’t be tested due to a lack of support for third-party tokens. An
Origin Trial extension
<https://groups.google.com/a/chromium.org/g/blink-dev/c/s83S7wXxa6E/m/AjvsIJxmAQAJ> was
necessary until M123.
Risks
Interoperability and Compatibility
/Gecko/: No signal
(https://github.com/mozilla/standards-positions/issues/521)
Can you add a comment to this issue pointing to this I2S, and any
relevant changes since the original issue was opened?
/WebKit/: Negative
(https://lists.webkit.org/pipermail/webkit-dev/2021-May/031845.html)
This issue has been taken into account:
https://github.com/w3c/compute-pressure/issues/24
https://github.com/w3c/compute-pressure/issues/24#issuecomment-1022516116
suggests asking for re-review once issue 24 is settled (at least that's
my interpretation). Do you know if that ever happened?
/Web developers/: Positive
(https://github.com/w3c/compute-pressure/issues/14)
/Other signals/:
Security
https://github.com/w3c/compute-pressure/issues/79
WebView application risks
No
Debuggability
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?
No,
Windows, Linux, ChromeOs, Mac.
Support on Android (incl. Android WebView) has been deprioritized as
there is no current way to access the telemetry needed after Android
11, and the current partners we are engaging with have no need as they
are using native solutions on Android at this point.
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes
https://wpt.fyi/results/compute-pressure?run_id=5116280230641664
The wpt.fyi results are flaky due to WPT bug 44438
<https://github.com/web-platform-tests/wpt/issues/44438>
DevTrial instructions
https://github.com/w3c/compute-pressure/blob/main/HOWTO.md
Flag name on chrome://flags
see https://github.com/w3c/compute-pressure/blob/main/HOWTO.md
Finch feature name
None
Non-finch justification
None
Requires code in //chrome?
False
Tracking bug
https://crbug.com/1067627
Launch bug
https://crbug.com/1173266
Sample links
https://w3c.github.io/compute-pressure/demo
Estimated milestones
OriginTrial desktop extension
123
OriginTrial desktop last
118
OriginTrial desktop first
115
OriginTrial desktop last
94
OriginTrial desktop first
92
DevTrial on desktop
109
Anticipated spec changes
None
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5597608644968448
Links to previous Intent discussions
Intent to prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/LTIRZ24C5Os/m/BPSeJ8y0BwAJ
<https://groups.google.com/a/chromium.org/g/blink-dev/c/LTIRZ24C5Os/m/BPSeJ8y0BwAJ>
Ready for Trial:
https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/-1ciwdn23J4
<https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/-1ciwdn23J4>
Intent to Experiment:
https://groups.google.com/a/chromium.org/g/blink-dev/c/QfJ4pngu3gc
<https://groups.google.com/a/chromium.org/g/blink-dev/c/QfJ4pngu3gc>
Intent to Experiment:
https://groups.google.com/a/chromium.org/g/blink-dev/c/HzVV-sM97T0
<https://groups.google.com/a/chromium.org/g/blink-dev/c/HzVV-sM97T0>
Intent to Extend Experiment:
https://groups.google.com/a/chromium.org/g/blink-dev/c/s83S7wXxa6E/m/AjvsIJxmAQAJ
<https://groups.google.com/a/chromium.org/g/blink-dev/c/s83S7wXxa6E/m/AjvsIJxmAQAJ>
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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