ThinkorSwim App System Lag

[MerryDay]

Good Afternoon Traders! I've read a lot of posts around the web about how to speed up TOS but still looking for some answers.

Four main questions:
1) Does referencing built-in TOS studies in User Defined studies slow things down? (I reference SequenceCounter in one of my studies)

referencing several complex studies whether built-in or custom could potentially slow down charting.
Sequence Counter on its own, will not.

2) Does the AddCloud function slow things down? (I have a study that plots several different clouds simultaneously)

AddCloud is not a complex function, in of itself should not slow charting down

3) I have a study that is about 1500 lines long. It has references to TOS built-ins, uses several instances of ATR, EMA, Fibs, etc. It seems to really bog down TOS. Does anyone know if I separated out some of the sections into individual studies and then stacked them on a chart if that would improve performance?

The number of lines of code has no correlation to whether a script is complex.
Four lines of code with complex functions could be too complex.
2000 lines of simple plotting might be fine.

(I've heard TOS is a single-core/thread application so I'm guessing this won't help because there's still only one core doing the same amount of work...)

You are correct.

4) Does anyone know how to reference a TOS built-in study but also have that reference address a higher time-frame? In other words, if I wanted to see SequenceCounter values from a 15Min time frame but have them plotted on a 5Min chart is that possible?

Sequence Counter is a proprietary code. No modifications can be made to it.

Some traders run multiple instances of TOS on their systems - that's not going to help me if I want mostly everything on a single chart.
However, I have been running multiple instances lately and have allocated a minimum of 24GB of RAM to each instance. Can't quite tell if that's helping.

Here is a thread for the discussion of ram:
https://usethinkscript.com/threads/ideal-memory-usage-settings-for-thinkorswim.10201/#post-128355

Here are more threads related to your discussion:
https://usethinkscript.com/threads/maximum-amount-of-lines-in-a-script.8258/
https://usethinkscript.com/threads/thinkorswim-app-system-lag.1173/