We don't know anything about your system or specific details about your footage etc. and not to put too fine a point to it: You don't apply a particle effect to an adjustment layer...
Wait i'll give you my specs, and in the past when i used rainfall on a adjustment layer i had no lag or freeze....
I'm at the beach when i go home i'll send you this
I have : Intel Core i7-4710HQ CPU 2.50GHz
32 Go Ram
256 Go ssd
1 TO HDD raid 0
GTX 880M 8Gb
Footage : 1080p 59.94fps Gopro Video
Before thos problem in all gopro video i never get lag but now i get these lag and i want to fix this problem thanks
You have applied Twixtor Pro to the project. That can take a lot of processor power. Render your comp to a production format, do not use MP4 or h.264, then import the rendered comp and apply your simulation effect to the pre-render.