Improve throughput by reducing number of calls to stats_half_start/stats_half_end

[justfalter]

Right now, stats_half_start and stats_half_end are called for each packet. In my testing, this accounts for ~13% of ettercap's processing time. If we were to sample once every 100 packets rather than once per packet, we'd significantly reduce it's impact upon Ettercap's performance.

[LocutusOfBorg]

this branch might fix this issue
https://github.com/LocutusOfBorg/Ettercap/tree/fix-215

can anybody please test it?

[koeppea]

@justfalter: Can you check #449 which request to merge the proposed change.
I've done a test case. Despite the bad throughput performance of Ettercap in general, it seems your promising idea didn't work out.
Could you please have a look. Maybe I've done something wrong.
Thanks.