Update: We ended up experimenting with M106+, because there was a bug in
the code in prior versions. The M106 Beta experiment has good results.
We'll start the 1% Stable experiment this week.

On Tue, Aug 9, 2022 at 9:47 AM François Doray <fdo...@google.com> wrote:

> Thanks! I started the 1% Stable experiment. I will share an overview of
> the results in ~3 weeks.
>
> On Tue, Aug 9, 2022 at 4:21 AM Mike West <mk...@chromium.org> wrote:
>
>> IMO, this is somewhere on the border between a web-visible experiment and
>> a pure expression of user agent preference regarding flexibility explicitly
>> carved out in a standard.
>>
>> Rather than debating the feature's philosophical state, I'd simply treat
>> this email as an Intent to Experiment from M104 (current stable) to M107,
>> and give you an explicit LGTM.
>>
>> Additionally: it would be ideal for the experience you gather in this
>> experiment to fold back into the spec as an "Implementation Consideration"
>> that might help other implementers determine how to use the flexibility the
>> spec provides.
>>
>> -mike
>>
>>
>> On Fri, Aug 5, 2022 at 9:24 PM 'François Doray' via blink-dev <
>> blink-dev@chromium.org> wrote:
>>
>>> +Scott Haseley <shase...@google.com> as an expert in this field.
>>>
>>> We would like to start experimenting with this intervention on 1% Stable
>>> very soon. We've been experimenting on 50% of Beta for almost 2 months. The
>>> results are encouraging and we aren't aware of negative Web developer
>>> feedback. Do we need your LGTM to proceed?
>>>
>>> On Mon, Aug 1, 2022 at 3:45 AM Zhang, Jiahe <jiahe.zh...@intel.com>
>>> wrote:
>>>
>>>> Contact emails
>>>>
>>>> jiahe.zh...@intel.com, fdo...@chromium.org
>>>>
>>>>
>>>> Specification
>>>>
>>>> https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html
>>>>
>>>>
>>>> Design docs
>>>>
>>>>
>>>>
>>>> https://docs.google.com/document/d/1WFyfKUUxqM7uKxKOGhLiOjyY6T7QRduVcuHN0f6vJkk/edit
>>>>
>>>>
>>>> Summary
>>>>
>>>> Enter Intensive Wake Up throttling after 10 seconds if the page is
>>>> fully loaded when it becomes hidden. Currently, wake ups from JS timers
>>>> with a nesting level >= 5 are throttled to 1 per minute after the page has
>>>> spent 5 minutes in the background [1], which is very conservative and was
>>>> chosen to allow a launch of Intensive Wake Up Throttling with minimal
>>>> regression risk. We're now planning to reduce this timeout to 10 seconds if
>>>> the page is fully loaded when hidden. [1]
>>>> https://chromestatus.com/feature/4718288976216064
>>>>
>>>>
>>>>
>>>> Blink component
>>>>
>>>> Blink>Scheduling
>>>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EScheduling>
>>>>
>>>>
>>>> TAG review
>>>>
>>>> Not applicable. This feature changes the behavior of an existing API,
>>>> while remaining spec-compliant ("Optionally, wait a further
>>>> implementation-defined length of time.
>>>> <https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#run-steps-after-a-timeout>
>>>> ")
>>>>
>>>>   Risks
>>>>
>>>>
>>>>
>>>>
>>>> Interoperability and Compatibility
>>>>
>>>>
>>>> *Gecko*: No signal
>>>>
>>>> *WebKit*: No signal
>>>>
>>>> *Web developers*: No signals
>>>>
>>>> *Other signals*: The more conservative version of Intensive Wake Up
>>>> Throttling shipped smoothly to 100% Stable more than 1 year ago. A few bugs
>>>> were filed, but in all cases we've been able to propose workarounds which
>>>> made apps more efficient (example
>>>> <https://bugs.chromium.org/p/chromium/issues/detail?id=1186569#c16>).
>>>>
>>>>
>>>> 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?*
>>>>
>>>>
>>>>
>>>> No, this feature will only ship on desktop platforms.
>>>>
>>>>
>>>>
>>>>   Goals for experimentation
>>>>
>>>> We plan to experiment on 1% Stable to confirm whether we observe the
>>>> same memory and power improvements as in the lab and on lower channels. We
>>>> will decide whether this intervention ships based on the experiment data.
>>>>
>>>>
>>>>
>>>> Ongoing technical constraints
>>>>
>>>> None
>>>>
>>>>
>>>> Debuggability
>>>>
>>>> This is not a new Web Platform feature.
>>>>
>>>>
>>>>
>>>> Will this feature be supported on all six Blink platforms (Windows,
>>>> Mac, Linux, Chrome OS, Android, and Android WebView)?
>>>>
>>>> No
>>>>
>>>> This feature will only ship on desktop platforms. On Android, the
>>>> system severely limits resource consumption from background renderers,
>>>> which makes this feature unnecessary.
>>>>
>>>>
>>>>
>>>> Is this feature fully tested by web-platform-tests
>>>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>>>> ?
>>>>
>>>> Yes
>>>>
>>>>
>>>> Flag name
>>>>
>>>> quick-intensive-throttling-after-loading
>>>>
>>>>
>>>> Requires code in //chrome?
>>>>
>>>> False
>>>>
>>>>
>>>> Tracking bug
>>>>
>>>> https://bugs.chromium.org/p/chromium/issues/detail?id=1324656
>>>>
>>>>
>>>> Estimated milestones
>>>>
>>>> DevTrial on desktop
>>>>
>>>> 105
>>>>
>>>>
>>>>
>>>> Link to entry on the Chrome Platform Status
>>>>
>>>> https://chromestatus.com/feature/5580139453743104
>>>>
>>>> This intent message was generated by Chrome Platform Status
>>>> <https://chromestatus.com/>.
>>>>
>>>>
>>>>
>>>>
>>>>
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>>> .
>>>
>>

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