Stuttering issues after genesis update

Found a fix (may not work for everyone)

Go into 

C:\Users\[Redacted]\AppData\LocalLow\Intel

(friends have also found the relevant intel folder in 'Local' rather than 'locallow')

Look for the ShaderCache folder. Open apex legends and check the folder. There should be a large file (around 250mb) that will show up as recently modified. Apex is using this cache file. To verify this, attempt to delete everything in the folder (they're cache files so this is okay and won't damage your computer) the files Apex is using will not be deletable and a dialogue box will inform you of this. 

Close apex and delete the files that Apex was using in that shaderCache folder. Change r5Apex.exe's permissions so it has full control under every user group. Add the user group 'Everyone' and give apex full permissions over this as well. 

Restart your computer and open apex. Apex should now start to write a new ShaderCache file in the aforementioned ShaderCache folder it'll take around 20ish minutes and you may need to select different game modes (without entering the game) for it to fully finish. After this finishes CPU will return to normal levels and you should be able to play with no stutters. The shadercache file apex was writing to should also stay at the same size.

I'm not sure whats going on but it seems as though my game was unable to use the shadercache file that it had previously wrote to resulting in high cpu usage. It created a new file every time it started up resulting in high cpu usage and in game stutters.