Switch to LWIP_CHKSUM_ALGORITHM #3 #42
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d-a-v
approved these changes
Jan 9, 2020
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Well I didn't know the three algorithms were already implemented. |
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Are you sure you need it as an lwIP patch? It seems easier as an lwipopt. We can do patches too if you like.
Algorithm 3 takes about 40% less time per packet on xtensa lx106,
so switch from checksum algorithm # 2 (lwip default) to # 3.
160MHz CPU, 1450B
46us - Algorithm 1
33us - Algorithm 2
19us - Algorithm 3
80 MHz CPU, 1450B
92us - Algorithm 1
64us - Algorithm 2
37us - Algorithm 3