Network Emulation Trace Developer Tools Proposal: PoC Info

Dear Chairs and all in Web Perf WG,

I am Co-Chair of the W3C Web & Networks IG. At TPAC 2020 WG meeting, during the Network Diagnostics API proposal discussion, I brought up a couple of topics which may be of interest in this WG. One amongst them was regarding a proposal we received to extend network Developer tools to emulate time-variant network conditions to assist web app testing (e.g. either emulating real world trace or user defined traces).

Background:
I would like to follow up from where we left. The Web Performance WG Chairs expressed interest and asked us to share any links, when available.
Pls. refer to minutes <https://w3c.github.io/web-performance/meetings/2020/2020-10-TPAC/index.html#h.8gfnc7p4nih>
I quote - "Yoav: Network trace idea sounds interesting in context of synthetic testing, but possibly orthogonal to this. If you could share links that'd be great."

Info:
The IG Members proposing this tool has made a simple Proof-of-concept, which also integrates into Browser Developer Tools (it's a very basic implementation with just one parameter viz., DL bandwidth).
For more details, take a look at the demo video available on TPAC 2020 website @  <https://www.w3.org/2020/10/TPAC/wn-lpp.html>
Source codes and other info. are available on Github at  <https://github.com/intel/lpp-network-trace>

Upcoming Event:
We plan to have the team make a presentation in our upcoming Web & Networks IG meeting in early March '21 (date yet to be finalised). We can share the Webex details, if anyone would like join us. Kindly let me know. I can work with the W3C Staff to forward the Webex Details, once the dates are finalised.

Request:
The team is seeking inputs and W3C engagement from interested members to add more features (emulate time variant latency, UL BW, etc), define trace format, Network Developer Tools UI, etc.
Our Interest Group is looking for feedback about this tool proposal and whether it fits in the broader scheme of things for Browsers. We would be happy to answer any queries using this email thread.

Regards
Sudeep
Co-Chair, Web & Networks IG
(sent on behalf of IG WNIG Co-Chairs & W3C Staff in CC)