In this blog post, QuestDB’s very own Andrei Pechkurov presents how to ingest large CSV files a lot more efficiently using the SQL COPY statement, and takes us through the journey of benchmarking. Andrei also shares insights about how the new improvement is made possible by io_uring and compares QuestDB's import versus several well-known OLAP and time-series databases in Clickhouse's ClickBench benchmark.