In some ways a bit cheeky that they took the 'dump it and see' approach rather than offering to work to upstream it, since it's kinda outsourcing the work of maintaining the performance improvements to the Python core devs rather than offering to put some of Facebook's considerable resources towards doing it themselves.
They could've kept these developments behind closed doors and nobody would mind it.
They also offered to provide support if anyone wanted to contact them. That is top-class behaviour from instagram, I personally couldn't expect more.
> What more could we expect from them to do?
> That is top-class behaviour from instagram
To be considered top-class, I would expect them to go the extra mile and contribute to upstream. As many other companies have done over the past and continue to do.
If you're going that mile, then my hat is off to you and the team, that's how it's supposed to be done! :)