[viig99]

Clearly these engineers have never done customer feedback for developing nations, twitter interactions clearly provide evidence for what musk said, but some engineers seem to be in denial, imho the firing is cause worthy.

[detaro]

Can you point to the "clear evidence" that "thousands of RPC calls" are the issue? Note that the dev didn't claim performance is good.

[david927]

Performance has been bad forever. Twitter has had forever to fix it. They haven't. By definition, the existing developers aren't smart enough to do it. The developer here is trying to throw smoke because he's embarrassed. He should be.

[sho_hn]

I think that's misreading the exchange. He was challenging Musk on the fact that "1000 RPC calls" isn't what's happening and isn't the reason for the slowdown in his opinion, but did not deny that there are performance issues - and even cited other reasons it's slow. I don't see the denial you see.

[viig99]

Said engineer, said 1000 RPC calls are not the issue, and when questioned further on proving a tracepath / perf result casually exited the conversation, to me it looks like they are not ready to do better or listen to valid criticism, leading conversations on semantics is just creating noise instead of acting on signals.

Also 1000 RPC's are a very valid performance bottleneck, 1000 * latency caused by serde+ network can compounds easily based on data locality + container network orchestration, no data was provided otherwise even when asked for.