Hi, On 2022-01-17 15:13:57 -0500, Robert Haas wrote: > I guess there must be something explaining it, but I don't know what > it could be. The client and the server are each running the checksum > algorithm over the same data. If that's not the same speed then .... I > don't get it. Unless, somehow, they're using different implementations > of it?
I think that actually might be the issue. On linux a test a pg_verifybackup was much faster than on windows (as in 10x). But if I disable openssl, it's only 2x. On the windows instance I *do* have openssl enabled. But I suspect something is off and the windows buildsystem ends up with our hand-rolled implementation on the client side, but not the server side. Which'd explain the times I'm seeing: We have a fast CRC implementation, but the rest is pretty darn unoptimized. Greetings, Andres Freund
