With iris Patrick x256 ressource pack 16chunks of render and deus ressource pack I get around 40-50fps but when I put continuity in my mod folder my fps goes down to 5

Did you test the resource pack on Optifine (with connected and emissive textures enabled) to see how performance is there?

Did you test the resource pack on Optifine (with connected and emissive textures enabled) to see how performance is there?

In optioned the performance are bad but if we turn on smart animations I got 30fps not 10. believe me i tested

Partix uses a LOT of CTM, enabling it via continuity or optifine loads thousands of very large (for minecraft) textures. This is likely expected behavior.

If you want the best performance, make sure you are using Sodium+Indium and other optimization mods. Plus, every computer is different and Optifine may provide better performance for older systems. Continuity's connected textures code is as efficient as it can possibly be so there is nothing I can do.