On Fri, Sep 23, 2022 at 12:50 AM Yoav Weiss <[email protected]> wrote:

>
>
> On Thu, Sep 22, 2022 at 8:06 PM 'Daseul Lee' via blink-dev <
> [email protected]> wrote:
>
>> Contact emails
>>
>> [email protected]
>>
>> Specification
>>
>>
>> https://github.com/whatwg/fs/pull/53/commits/618b663ebdc0f9842d7db3091baed5f75aa87534
>>
>> Summary
>>
>> Updates the asynchronous methods (`flush()`, `getSize()`, `truncate()`)
>> in `FileSystemSyncAccessHandle` in the File System Access API to
>> synchronous methods. `FileSystemSyncAccessHandle` currently has a mix of
>> sync and async methods, hindering the performance and the usability,
>> especially for applications porting C/C++ to Wasm. This update will bring
>> consistency in the API usage and improve the performance for Wasm-based
>> libraries.
>>
>>
>> Blink component
>>
>> Blink>Storage>FileSystem
>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EStorage%3EFileSystem>
>>
>> TAG review
>>
>> https://github.com/w3ctag/design-reviews/issues/772
>>
>> TAG review status
>>
>> Pending
>>
>>
>> Risks
>>
>> Interoperability and Compatibility
>>
>> Compatibility:
>>
>> Changing a return type from Promise to value can break, only if Promise
>> methods are directly used rather than `await`. However, we expect minimal
>> breakage due to very low usage (~0.00002% page loads; zero usage queried
>> via HttpArchive).
>>
>
> Do I understand correctly that this usage is a loose upper bound of users
> of the API, and not necessarily sites that are not using `await`?
>
Yes, that's correct. It includes any usage, whether it is `await` or
`Promise.then()`


> Does it include all the APIs that are planned to stop returning Promises?
> Also, can you link the use counter?
>
For truncate() method as an example, here is the link for use counter:
https://uma.googleplex.com/p/chrome/timeline_v2/?sid=33c4e21724eb85df0bdc19ff775d0018
Unfortunately, it times out for (unique) count clients, so the above link
is filtered on Mac OX only. It is still very slow, though.

Some other links:
Page load %:
https://chromestatus.com/metrics/feature/timeline/popularity/4019
Additionally, we tried querying HttpArchive directly, and 0 usage has
returned.

As a side note, we have an enterprise policy set up to guard this change to
prevent breakage.

>
>
>> The original API was shipped in M102 and targeted for partner usage, to
>> which the changes may be communicated. In addition, all code snippets and
>> examples in public documents use `await`, which does not cause any breakage.
>>
>> Interoperability:
>>
>> There are no interoperability risks expected. The design change was
>> initially proposed and assessed from vendor feedback.
>> https://github.com/whatwg/fs/issues/7
>>
>>
>> Gecko: Positive (
>> https://github.com/whatwg/fs/issues/7#issuecomment-1226562961)
>>
>> WebKit: No signal
>>
>> Web developers: Strongly positive (https://github.com/whatwg/fs/issues/7)
>>
>> Other signals:
>>
>> Ergonomics
>>
>> Low ergonomics risks are expected. In fact, the goal of this change is to
>> improve the ergonomics of the API by making all methods to return
>> synchronously and make it easier to use on Wasm-ported applications.
>>
>>
>> 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
>>
>> Basic tooling: Autocomplete works as described in "New WebIDL/DOM
>> interfaces and attributes".
>>
>>
>> Will this feature be supported on all six Blink platforms (Windows, Mac,
>> Linux, Chrome OS, Android, and Android WebView)?
>>
>> No
>>
>> Desktop only now. Origin Private File System (including
>> `FileSystemSyncAccessHandle`) is planned to be shipped on Android in the
>> near future.
>>
>> 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
>>
>> sync-access-handle-all-sync-surface
>>
>> Requires code in //chrome?
>>
>> False
>>
>> Tracking bug
>>
>> https://bugs.chromium.org/p/chromium/issues/detail?id=1338340
>>
>> Estimated milestones
>>
>> DevTrial on desktop
>>
>> 106
>>
>>
>> Anticipated spec changes
>>
>>
>> https://github.com/whatwg/fs/pull/53/commits/618b663ebdc0f9842d7db3091baed5f75aa87534
>>
>> Link to entry on the Chrome Platform Status
>>
>> https://chromestatus.com/feature/5149644305203200
>>
>> This intent message was generated by Chrome Platform Status
>> <https://chromestatus.com/>.
>>
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>> .
>>
>

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