path: root/src/widgets/widgets
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authorTimur Pocheptsov <>2017-10-12 15:02:09 +0200
committerTimur Pocheptsov <>2017-10-16 16:54:32 +0000
commita520c179b89610248ef97f614d6b831ccee54c6b (patch)
tree553faf7adb5aa9339ed23f062975fa85a11d8431 /src/widgets/widgets
parent65eed6d5978738b06e047c9bd5d162b2596759f7 (diff)
HTTP/2 protocol handler: tweak receive window sizes
We were using the default ones, provided by RFC7540. It appears they are way too restrictive and conservative: when downloading something relatively big, a stream keeps spending the whole session/its own 'recv' windows and thus we have to constantly send WINDOW_UPDATE frames. This significantly slows down our HTTP/2 implementation, making it orders of magnitude slower than HTTP/1.1. To fix this: - We send SETTINGS_INITIAL_WINDOW_SIZE in the first SETTINGS frame to inform our peer that per-stream WINDOW is bigger than 64Kb - We increase the session's receive window size. Task-number: QTBUG-63722 Change-Id: I31312fcfd5f0fc0aee6aaa5d3562cc7d1b931adc Reviewed-by: Edward Welbourne <>
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