Optimising a Macbook Air for post processing

Hi all.
I am running Lightroom and Photoshop on my 2015 Macbook Air with 8gb ram. For the most part it runs acceptably when using LR and PS but I’m sure it can be improved.

Are there any easy fixes to make it run faster? I don’t have that many applications on it nor do I have my images saved to it. It is also updated to the latest OS version.

I understand that you can’t add ram to Apple products after the sale too unfortunately.

I will upgrade to something more suitable in the future but I just can’t justify the expense at the moment.

Any advice gratefully received.

Chris