Re: Please review performance aspects of Incremental Font Transfer

+Garret Rieger <grieger@google.com> +Myles C. Maxfield <mmaxfield@apple.com>


Thanks Garret and Myles for hopping over to the call yesterday.
Rough minutes from the discussion are in this doc
<https://docs.google.com/document/d/1B4SXlxQwJLwoQRkl5RQeBJ8GMjOB9qNxX4n3Vt9Js1o/edit#heading=h.ysuruy6slns6>.
I'll publish them to Github shortly.
I also opened a few issues
<https://github.com/w3c/IFT/issues/created_by/yoavweiss> and commented on
existing ones. Happy to discuss more! :)

Cheers,
Yoav

On Fri, Jul 1, 2022 at 3:30 PM Chris Lilley <chris@w3.org> wrote:

> Hi Nic,
>
> Excellent, thanks for the swift response. We look forward to your comments!
> On 2022-07-01 15:27, Nic Jansma wrote:
>
> Hi Chris,
>
> Thank you for bringing this to our attention.  We have put it on the
> agenda[1] for our next WebPerf WG call (July 7th)
>
> [1]
> https://docs.google.com/document/d/10dz_7QM5XCNsGeI63R864lF9gFqlqQD37B4q8Q46LMM/edit#
>
> - Nichttps://nicj.net/
> @NicJ
>
> On 6/28/2022 8:23 AM, Chris Lilley wrote:
>
> The Web Fonts WG requests review of the Incremental Font Transfer (IFT)
> specification by the Web Performance WG. A new WD of IFT was published
> today [1]
>
> This specification defines two methods to incrementally transfer fonts
> from server to client. Incremental transfer allows clients to load only the
> portions of the font they actually need which speeds up font loads and
> reduces data transfer needed to load the fonts. A font can be loaded over
> multiple requests where each request incrementally adds additional data.
>
> Earlier work [2] demonstrated the performance improvements n terms of
> bytes transferred and reduced network delay, for various network types.
>
> The current work proposes a specific networking mechanism by which the
> client and server can negotiate  which IFT method to use [3], and to
> transfer requested subsets of the entire font [4][5]. We would particularly
> value the review of the Web Performance WG on those aspects, although
> review of the entire specification would of course be most welcome.
>
> [1] https://www.w3.org/TR/2022/WD-IFT-20220628/
> [2] https://www.w3.org/TR/PFE-evaluation/
> [3] https://www.w3.org/TR/2022/WD-IFT-20220628/#method-selection
> [4] https://www.w3.org/TR/2022/WD-IFT-20220628/#extend-subset
> [5]
> https://www.w3.org/TR/2022/WD-IFT-20220628/#browser-behaviors-subsequent-requests
>
>
> --
> Chris Lilley
> @svgeesus
> Technical Director @ W3C
> W3C Strategy Team, Core Web Design
> W3C Architecture & Technology Team, Core Web & Media
>
>