only have one problem I get lag in a pirsuit?

...This isn't detailed much of at all.

 

Do you normally get lag at high speeds or do you just lag during pursuits?

It's more than likely your machine not being quite strong enough.  Try to reduce your settings.  I have never once noticed a performance dip in any LSPDFR related activities throughout my time testing.

Same issues for me.

My PC before --> 40fps avg.

My PC after --> 20fps avg.

Will do some accurate tests in a bit...

 

Ok thanks can happen at speed 

Can try and run this commandline, I use it and seemed to help with stuttering and fps. While running LSPDFR and ragehook I also seem to not have troubles.

1. Create a text file named commandline.txt (just like gta4 had if messed with commands then)

2. Open with notepad and Add these lines and change the width and height to your current resolution.

-borderless
-width 1920
-height 1080
-disallowResizeWindow

this will run the game in borderless windows mode and should smooth things out some.

-optional command is

-maxthreads=8

only add this if your sure your processor has 8 threads otherwise change it to your processors max threads.