[lwip-devel] [task #7040] Work on tcp_enqueue

[Bill Auerbach]

Follow-up Comment #9, task #7040 (project lwip):

I can confirm that this works with the same test I've been using when I first
noticed the problem.

I don't know the impact to the code size, but the impact on performance
(throughput) for sending large amounts of data is about 1%.  It might help if
the last packet in the queue were saved in the pcb to eliminate the search to
the end that is required. Maybe for long chains this is where the time goes? 
Or have tcp_write return the number of bytes queued and let it simply queue
'len - len % mss' bytes and return this amount.  The problem is that this
breaks code that calls tcp_write.

I know there was a lot of effort put into this and I appreciate that.  From
my position, I would like to use it, but I need a performance increase, not
decrease.

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