There are too many bees in the nether, it appears to be Crimson Shoombees there are dozens of nests around every cluster of Crimson Shooms.

Here is a spark profile -
https://spark.lucko.me/uT48CAOR4g

Here is a screenshot of /forge entities list showing 3798 bees. Also showing 2.2 TPS

On returning to the overworld, here is a screenshot showing 20 TPS

Apologies for interjecting with an off topic question, my google-foo is totally failing to give me an answer.
What's the command/mod to get the statistics you've shown for the tps?

The performance profiles are from the mod Spark
https://www.curseforge.com/minecraft/mc-mods/spark
/spark healthreport
is also incredibly helpful.

The TPS is from /forge tps
the entities list is from /forge entities list

The worldgen must have gotten fucked in the 1.19.3. update. Thanks for reporting it, I'll have a look into it.

Also observing this issue on my ATM8 server. Dropping to ~10 TPS in the nether. Spark shows ConfigurableBee.tick as the highest consumer, nothing else is even close

Can you provide your sparks profile? ATM8 is on 1.19.2 so it might not be the same issue

an entity count would also be nice

https://spark.lucko.me/NFIN7GUnJ9
Seems to be the Bee's aiStep

It's more of a problem when we have multiple people running around in the nether, that profile was just me in the nether. But last night we had 2-3 people in there and were dropping to ~10 tps. I didn't manage to catch a profile of that sadly.

Is there any way I can just stop the bees from spawning as a temporary fix?

42 bees is not uncommon and they use 14% of the resources flying around which is bad but that's just Minecraft pathing being shit.

you can run a kill command if you're not interested in keeping the bees

/kill @e[type=productivebees:configurable_bee, name="Warped Shroombee"]
/kill @e[type=productivebees:configurable_bee, name="Crimson Shroombee"]

there's also a config option to disable the nether nest spawns, but some say it doesn't work but worth a try

Setting:

 #Disable the wander goal in bees to increase performance
        disableWanderGoal = true

Fixed the AIStep usage

forgot I had added that, it makes the bees a little bit wonky :D

1.19.3 support is dropped