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Might it be that this is some effect of
Yes, that fixes it for the "h2" case (TLS). The "h2c" case, where no upgrade is triggered because of request content, it still seems unchanged slow. I see no delay, but the upload takes longer than in the TLS case. Some fallback code when nghttp2 does not kick in perhaps?
As you can see below, the initial wait is gone in all cases, but the upload itself shows poor performance when
Timings with curl from github (this morning):
Timings with curl 7.41.0:
We prematurely changed protocol handler to HTTP/2 which made things very slow (and wrong). Reported-by: Stefan Eissing Bug: #169