We're trying to convert our code in lemmy to use attohttpc, (we were using isahc previously), but when doing a lot of concurrent attohttpc gets and posts (in actix threads), we're getting a lot of WouldBlock errors :

Internal Server Error: Error(Io(Os { code: 11, kind: WouldBlock, message: "Resource temporarily unavailable" })), in apub::fetcher::fetch_remote_object()

We also tried disabling the tls (since that's the only instance of wouldblock we could find), but it didn't help.
For some reason isahc doesn't have these issues.

Related issue : LemmyNet/lemmy#840