You can atleast try to run it for min on injection, so you can see the difference. Script works perfectly for everyone else and also for me.
Using runelite, osbot, or whatever other client exists are all teh same for jagex, they don't see what you are using.
I tried on several accounts and several machines. No problem like you can see the proggie I showed you... Maybe your computer has a hard time running mirror mode?
I have no clue why it only runs at 8k/h for you, unless it's something with your client or your pc..
What gear setup are u using?
Enjoy the trial!