Possible Fixes

Yes

Modpack Version

ATM 9

What happened?

Whenever Shift + click to craft a stack of items it lags the whole server, getting everyone stuck at once.
I have a powerful server with a Ryzen 7700x as the server's CPU and 64Gb of system ram, dedicated 24 to the server, only 3 people online on average but whenever anyone shift + clicks it lags the server from 20 ticks down to 5 ticks, I can see it in spark.

I DO NOT have this issue with refined storage when using the drives, I will also mention that in AE2 I am also ONLY USING DRIVES, I do not have ANY external storage linked to my network, and in comparison Refined Storage instantly crafts anything without any lag, I can even spam it, in AE2 it lags the server terribly when crafting just one stack...

The only thing of note is that I am using AE Additions Deep Item Storage disK instead of the usual 63 type limit drives, will change the drives to vanilla AE2 just out of curiosity if that is the issue...

latest.log

No response

Developer reports

No response

UPDATE: There has been a significant improvement by using vanilla AE2 disks, this is not AE2's fault or ATM9's fault, I will close this issue since this is not ATM9's concern, it's AE Additions's author's concern.
Hope this will help people in the future to find out why ATM9 was lagging