It's relatively fast. Like 300k req/s on an old intel i5 with 4 cores fast.
https://openswoole.com/benchmark
Or 40% of top Tech Empower speed in composite score: https://www.techempower.com/benchmarks/#hw=ph&test=composite...
A quick glance tells me they put a lot of effort into it.
The least you could do is not post shallow mocking dismissal.