What are your current net settings?

What configs have you tried?

Any in-game sound? Only impact sounds and footsteps should have been removed.

What's your CPU?

What version and presets/addons do you have for mastercomfig?

What are your launch options?

Do you run the game in windowed or fullscreen?

Have you disabled fullscreen optimizations?

What's your hardware specs, OS, config, temps?

6.4.0 released with networking improvements, performance optimizations and documentation updates

This is the maximum size a packet can be before it gets split up into smaller pieces. The default in the config should be fine and the most reliable for most users.

You'll probably need the lower value if you have a lowend router/network or WiFi that can't handle the larger packets and is thus losing them. However, keep in mind that on lossy WiFi connections, the increased split packets from the lower value might worsen the effects of packet loss if it's just a signal issue.

The larger value is to slightly reduce the amount of packets that need to be sent, for weaker CPUs that will largely benefit from less split packets. Also it can be used if you're absolutely certain everything on your route can handle the larger size.

first result: https://avatars3.githubusercontent.com/u/2672245?s=400&v=4

first non related result: http://www.code3pse.com/public/images/product_images/large/C_3MCB_large.jpg

6.4.0-b2 https://github.com/mastercoms/mastercomfig/releases/tag/6.4.0-b2

I can't think of anything useful besides snd_async_minsize

Fully clean up your TF2: https://github.com/mastercoms/mastercomfig#clean-up

What's your up/down speed?

Not reaching the FPS cap is fine. That's just there as an upper bound to prevent some possible glitches with an unlimited FPS cap.

Having a lower FPS cap is personal preference, like if you want a stable framerate or want to prevent overheating, as sage mentioned.

6.4.0-b1 https://github.com/mastercoms/mastercomfig/releases/tag/6.4.0-b1

and new Steam Group https://steamcommunity.com/groups/comfig

It just reuses prediction data from the previous frame that can be slightly off for the server.

That value comes from 1.5 / 66. This is so that you aren't always relying on one snapshot to make it to your client on time.

Yeah, the interp in my config is low enough for it to be good for projectile classes while still being reliable enough for hitscan.

I think restarting the game in between with the addon and without would get rid of any performance boosts from caching.