The Ressourcepack Put My Pc To 1fps

I would like to know why and what can i do against it ?
Usually everything is fine and i have 30 fps but at the second were the pack is loaded it put my fps down to 1 fps...

 

I'd recommend you download Optifine to help boost performance (Personally recommend using Optifine 1.12.2)

 

I tried but it still doesn't work...i don't know what to do...and i know it's because of the pack because when i don't use it the game work correctly and my fps are around 20 to 30 fps

 

If you're getting 20-30 fps in Wynncraft without the pack, it might be an issue with the pack itself, and deleting it and redownloading it may help a bit. However, if you're 20-30 fps nuber is taken on another server or in a singleplayer world, your computer may not be able to handle it; Wynncraft takes a disturbing amount of computer to actually run well (Anybody remember swarms? I don't; they used to crash my computer.), due to the large number of players and models 'n' stuff and if you're only getting 20-30 fps normally, your computer may not be able to handle the level of lag-creation that is Wynncraft.