Camera Raw : raw conversion is using CPU or GPU ?

Hello !

Do you know if raw conversion under Photoshop is using CPU only or can be fastened by using GPU ?

How can i get this information ?

From Adobe's documentation, GPU are used for different kind of tasks : https://helpx.adobe.com/photoshop/kb/acr-gpu-faq.html

What impacts the raw conversion performance ? The input size ? The output format ? 

Thanks in advance, best regards