You already asked this question:
https://www.esoui.com/forums/showthread.php?t=10380
Any data collection mod will cause that but for the upcoming changes to guild history there is a binary file being saved so that users have some information in the guild history cache. This will increase load times but it may not be significant until users are able to specify how much time to save.
With LibHistoire you cannot clean that file out at this time. After update 41 it will be reset because of the changes and that should reduce load times.
With Master Merchant you are choosing to have sales data so then expect the load times to be longer depending on how much time you specify. If you want to limit the amount of data look at the options.
Read the docs:
https://esouimods.github.io/3-master...agementOptions
Then you have HarvestMap. If you enable that then it will increase load times.
Basically you want the mods you have so 28s is what you should expect. If you don't need MM and HarvestMap for doing daily writs or something then disable them for Writs and use them for normal play.
For MM read the docs on what to disable:
https://esouimods.github.io/3-master...nMMisnotneeded
Although it's not in the docs, you can disable LibHistoire when MM is not needed. I don't know if that's a really good idea all the time. Simply because currently data for that isn't from ZOS. So you may miss out on data if you keep it disabled. While the data is significantly restricted by zos at times, it is requesting data automatically.
I have a very old computer and am at the point I may not be able to continue to play or mod or test mods due to PC limitations.
https://pastebin.com/JmtgwCnD
What I think is funny is you and some others have complained in the past about less than 30s load times. With my PC, I am lucky if the game reloads the UI at all and saves the data when I exit the game. The load times are 3 minutes or more.