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Confiscated the Netgear R7000; temporarily switched it with the backup R6300v2 after finding wireless performance issues with the R7000 and FreshTomato 2022.6. Oddly enough, that same variant firmware is fine with the R6300v2.
Newer DD-WRT versions have an even newer kernel as well since I last touched it with the R7000; may experiment with that this time.
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Found out it's not FreshTomato's fault, but apparently CTF actually has some performance improvements in LAN transfers. Temporary R6300v2 had CTF on then I turned it off... eventually it had about the same speeds as the R7000 before confiscation.
R7000 has a near-latest DD-WRT firmware version: r51032, built on 2022-12-15. SFE and CTF were tested: SFE used up more CPU (sirq), but had transfers on ~33MB/sec on 5GHz Wi-Fi.
Will flash FreshTomato on it again and restore the NVRAM/config and do more testing with CTF... along with WDS this time.
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R7000 is now primary, with DD-WRT as a real-world test. Remember these (frankly stupid) hacks:
CTF - enabled
CTF+FA - enabled (through override; may do jack)
CPU overclock to 1200MHz
During this test, I ran a bufferbloat test, then two speed tests immediately after. Router crashes. Well, I have to recreate this, and sure enough, it crashes again.
I then relocated to the stable router, upgraded the firmware to version r51043, built on 2022-12-19. Recreated the test issue again, and this time, it didn't crash. Very odd. This needs more testing, and it wasn't caught during the initial runs. This lived through four connected wireless devices and a Twitch stream; and was caught when ~10 wireless devices were connected.
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ctf_fa_mode is set to 0, so CTF+FA is technically not running. I'll try again next day, and set that to 2. 😈
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...That was extremely hacky. This worked too well, but for some reason the wireless radio throughput is weaker on DD-WRT than on FreshTomato. Going to reflash the R7000 to latest FreshTomato 2022.7 later.
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Confiscated the R7000 again and flashed FreshTomato 2022.7, but starting anew this time. With this router, it should use the specific WLAN antenna settings with this version.
As for the LAN-LAN performance testing , SFE won out.