[robocat]

Are you sure PHP is the bottleneck?

The author writes that Clickhouse takes 0.1s for an example request: https://news.ycombinator.com/item?id=42666703

PHP would need to be adding 0.1s CPU time for processing the request for the PHP code to become the bottleneck. That seems unlikely.

[thunky]

That 0.1s is to write 4k rows to clickhouse, not per (log write) request.