Re: [hybi] I-D Action: draft-ietf-hybi-thewebsocketprotocol-13.txt

[Joel Martin <[e-mail]>]

On Wed, Sep 7, 2011 at 8:31 AM, Tobias Oberstein <
[e-mail]> wrote:
>
> at least for the Python/Twisted implementation I can say that - even after
> quite some optimization experiments - the masking is the bottleneck.
>

I notice you are doing the unmasking directly using python code (
https://github.com/oberstet/Autobahn/blob/master/lib/python/autobahn/websocket.py#L635).
Have you tried doing the unmask by offloading it to something like numpy? If
not, you might try something like this:

    numpy.bitwise_xor(data, mask)

You'll need to handle modulus 4 data (since numpy.bitwise_xor wants the data
to be modulus the mask), but that's the general idea. Here is how I do it in
websockify:
https://github.com/kanaka/websockify/blob/6e263063c2b63642a0e17cb91d6b9f6c9365c0c0/websocket.py#L293
My main test is noVNC which doesn't send much data from client to
server,
but I think numpy will do the unmask significantly faster than doing the XOR
in python code directly.

Regards,

Joel Martin (kanaka)