Proxy slow when download file

[nutinshell]

By using Chrome with SPDY proxy, when downloading big file at high speed, browsing web pages become very slow, is this the unknown bug? Seems like issue: spdy-http2/node-spdy@be33b5a but I'm not sure.

[tatsuhiro-t]

I don't know what the node-spdy commit does either, but this issue is inherent problem of simple SPDY priority mechanism and if the priority is equal, they are raced and not interleaved nicely.
Here is the patch to make DATA frames interleave more frequently:
https://gist.github.com/tatsuhiro-t/5643313

Could you try this patch and give us your feedback?

[nutinshell]

Thanks. The node-spdy commit fixed a very same issue like this, so I wonder it may happen on shrpx. I tried the patch, seems much better, but Chrome still has great web pages latency when downloading file.

[tatsuhiro-t]

Updated the patch to give lower priority streams more chance to output
https://gist.github.com/tatsuhiro-t/5643313

[nutinshell]

Hi, it gets better, but still very different with TLS proxy, downloading file has no impact to web pages browsing. Maybe it's part of Chrome's issue.

[tatsuhiro-t]

Do you mean stud by TLS proxy? Then yes, it is different because TLS proxy uses multiple connections: one for downloading large file and others for web contents. On the other hand, chrome normally uses just 1 connection to SPDY proxy and all traffic goes through it.
If the patch goes well, I'll push the changes to the repo.

[nutinshell]

Yes, it's stud TLS. The patch makes better, thanks.

[tatsuhiro-t]

The change was committed. Let's close the issue.