lower speed

[akamizi]

with my model TP-Link TL-WR1043N/ND v1, with the same configurations and in lan (not wifi), the speed with http://www.speedtest.net/ went from 500Mbps to ~250Mbps
I downgraded

[gwlim]

Did you enable SFE or Flow Offload?
Only basic features are enabled at startup in new firmware.
SFE is not enabled by default you need to ENABLE then START

[akamizi]

I started the service and tried various combinations with flow offload active and inactive, and restarted, but the best speed obtained was 340Mbps

[akamizi]

I'm trying to flash again with the factory version (my model is 32M)

[gwlim]

Try reboot after enabling. If you don't reboot the "slow path" might still be semi active.
Make sure other people are not using the bandwidth when you test.
Make sure it is not the speedtest server issue.
Speedtest and your ISP may not be 100% always full capacity especially if they do throttling.
DO NOT open the router webpage while testing, the single core router will need to do context switch and call back to your web browser affecting routing performance because it is not hardware offload so CPU is needed.
Flashing back to factory will not help
I tested the builds with jperf before uploading.
Use either SFE or Flow Offload not both at the same time.
If you turn on SQM with SFE it will slow down as it pass though SQM QDisc

[demorphica]

just wanted to understand how do we make the decision on whether to enable SFE or Flow Offload?
Are there any considerations which would help decide?