Performance Tips is where I shine!
As a resident potato PC member, there is a couple things ill always do to make Gmod run a lot smoother.
First in console ill type: gmod_mcore_test 1 This enables multi core usage on Gmod, giving you more fps, and if not will still make it much smoother, so not as many massive fps lag spikes.
Also no idea if it actually works but it feels like it does, ill do !fps when I join, and ill do it on off maps as well time to time and it seems to work, maybe placebo is at work idk.
And another is a bit more complicated so ill have pictures.
First, go into Task Manager
Then you need to click more details arrow,
Then you need to find gmod on that list, i dont have it open so im gonna use Nvidia as an example, you then right click it and press go to details
Now you will have that process highlighted in the new tab
If it doesnt highlight or there is alot, you can tell by what used the most resources.
Then you need to right click again, and click set priority - then high. (NEVER DO REALTIME) You will then get a prompt saying are you sure, this could cause system instability - but that can only happen if you do real time, hence never use it.
And boom! Gmod should be running alot better now!