DeltaTime (delta = change, learn to higher science) refers to how long the game tries to take between frames. The higher the deltatime, the less the game struggles, and the lower your FPS. Lower deltatime, and your FPS will go up as the game tries to render more frames.

for that section of the tutorial i'm specifically talking about SIM frames per second. ill put that in to clarify.
thanks for explaining it to him grif.

This tutorial is great, it helped me lots because my computer is slower than an old man going up a fudging mountain. Great job.

glad it helped you. i really think the vanilla settings need some fiddling, but i think that mighthave been done anyway..

since i fixed my deltatime, my actors and guns fall through the floor easier. can i fix this?

Not really. Messing with deltatime affects the entire simulation in how it calculates collisions and such, so you will be falling through things easier, and collisions will be messed up. You can try setting it to a value closer to the original until you have a balance between speed and simulation.

Super helpful tutorial!

Now my CC runs great!

Mucking around with Deltatime may reduce lag, but it increases visual lag as the game skips around a lot, and the physics becomes woeful: objects do random, inexplicable things, such as explode, or move faster than they should have.

I recommend leaving it alone, change other things (such as resolution) instead.

Eh, taking it down to between 45-30SFPS works fine for me, especially on crappy laptops.

this is a good tutorial but a really good way to speed stuff up is to delete/disable mods becuse the more mod the slower the game will be(i dont just mean at the start of the game but why u play the game)
the bigger the mod is more slower the game it will be
good mods to delete/disable is one like Unitech (those big ones) but the ones are small dont make much of a difference e.x. mod which only have 1 gun in it

if u dont want to delete the mod try this
viewtopic.php?f=61&t=17454

and u should Defragmenting the computer because cortex command really makes a lot of errors (which makes corrupted files)

It should not be doing that, and that's not even what causes Disk Fragmentation. Moreover, it's not going to improve your speed when you fix that.
But yes, as everyone ought to know (from birth!), removing mods makes the game run better. Not using lua also does this.
But most people like using mods, and I for one keep a separate copy of CC just for running everything at once.

A few quick edits here and there, figured it could use a going over now that it's more than a year old.

I just wonder... how to set up Simulations Per Second(SPS) and Frames Per Second(FPS) individually.
Currently we have DeltaTime settings which decides one of them and we have the option of "simulate on each frame" which makes me confused.

Actually, i don't want so much FPS (200+ on some simple scene). i want to keep FPS low and stable (for example 30FPS no matter the scene is simple or complicated) while SPS being still high enough so no simulation problem would occur.

I don't believe the settings get so fine as that. You just have to play with them until your computer can handle the amount of simulation you want per frame.

You cannot set the FPS at all.

The game renders the game at the maximum number of frames per second it can manage (200+ in some cases, less than the number of sim frames otherwise), which incidentally means that the FPS the game is running at is a good indication of how well your computer is running the game. As rendering a frame really only means blitting the images to the screen (rather than doing any fancy raytracing or what have you, the overhead is negligible when compared with the cost of running a simulation cycle, and is used to fill in the gaps between simulations when the game is running faster than need be (ie when FPS > SFPS).

Why do you want to limit FPS?