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by simonw 947 days ago
Almost exactly the same as DuckDB then - I measured ~287MB.
2 comments

I ran the same queries and got similar results but the bandwidth utilization I measured was significantly different. On the same fly.io instance with 1vCPU/256MB both queries completed successfully but ClickHouse/chdb reached 10MB/s (max) and logically completed the count faster, while DuckDB only peaked at around 2.5MB/s.

This might be due to the tiny resources but I like rock bottom measurements. Did anyone else notice a similar bandwidth utilization gap?

Probably compression
If that's raw network transfer, it's probably just a difference in headers or MTU size. Larger MTU -> fewer headers required. Maybe a difference in network configuration that requires more or less data in the header.