A way to supply your own binary for copy

[funlennysub]

Is there a way i can pass my own byte array to copy command? From my testing current writer takes ~5 minutes on my laptop to output a binary for ~9mil entries (15 fields) while my own simple impl takes ~20 sec, I'd like to spend as little time as possible on generation if possible

[Steven Fackler]

Yes:

https://docs.rs/postgres/latest/postgres/struct.CopyInWriter.html#impl-Write-for-CopyInWriter%3C'_%3E
https://docs.rs/tokio-postgres/latest/tokio_postgres/struct.CopyInSink.html#impl-Sink%3CT%3E-for-CopyInSink%3CT%3E