Re: [lwip-devel] more slow code

[Kieran Mansley]

On Tue, Apr 04, 2006 at 11:57:45AM +0300, Atte Kojo wrote:
> On Tuesday 04 April 2006 11:42, Christiaan Simons wrote:
> > I think the linear search in find_entry()
> > over the ARP table is the culprit.
> >
> > I guess lot off subsequent (burst) IP packets can come from the same
> > source,
> > without much use for updating the table.
> > So update_arp_entry() should return as quickly as possible for that case.
> 
> One solution that comes to my mind is to keep a one-entry cache in 
> find_entry(). This should at least speed up the case when the stack is 
> communicating with a small number of hosts and when receiving bursts of IP 
> packets.

Agreed.  That would be both simple to implement and catch many of the
cases that lwIP is likely to encounter.

Kieran