We have not benched against clickhouse yet. Sorry. Sounds like this should be an interesting things to do!
The broader question though is how does your offering compare to Clickhouse?
co-founder of questdb here - we have been asked the same question on reddit as well. We are starting to work on an article going through a comparison between QuestDB and Clickhouse today - this will also include a bench. Will share as soon as we can. stay tuned!