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Reduce performance impact of stream stats #361
Description
For 64 byte packets with v1.2.0
- Without stream stats tracking enabled: 490 Mbps
- With stream stats tracking enabled: 385 Mbps
A loss of 100 Mbps (~20%) which I can't explain. A quick look at perf top also doesn't show anything obvious.
The most costly operations seem to be stats_ access/updates within PcapTxThread::sendQueueTransmit() but the whole function itself (except it's children) takes up only about 2% cpu. So it's likely something system side that needs to be studied in greater detail.