RE: RE : [lwip-users] Optimizations for applications requiringlimitedfunctionality.

[Roger Cover]

Greetings Frédéric,

The performance decrease I measured was relative to version 0.6.3 of lwIP. The 
measurement is the total transfer time for a 33560192 byte data set from my 
instrument to an application on my PC using TCP/IP. The time was 13.98 seconds 
for lwIP 0.6.3 and 19.56 seconds for lwIP 1.2.0. I am using the same "driver", 
with minor modifications to accommodate the API changes in the lwIP code from 
0.6.3 to 1.2.0, and the same applications on the PC and my embedded PPC405 
processor. Removing the statistics improved the performance, but did not 
recover the entire 40%.

I will let you know what improvements I get from the lwipopts.h changes you 
suggested.

Regards,
Roger
-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Frédéric BERNON
Sent: Saturday, April 14, 2007 3:03 AM
To: Mailing list for lwIP users
Subject: RE : [lwip-users] Optimizations for applications 
requiringlimitedfunctionality.

Hi Roger,

>I have noticed a decrease in performance (about 40%)
40% ???? Was is this measure ? Max bandwidth on output, number of cycles used, 
footprint? If I understand what you wrote, it was on max bandwidth? And just 
due to statistics? Seems strange...