How to tell how 'script heavy' your load order is?

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I've had issues in the past with strange things happening if I installed certain mods. All the ones that causes this for me were ones that came with warnings that they were 'script-heavy'.

Problem is, I don't know how 'script-heavy' my game really is. I have frostfall, which I know uses scripts. Skyrim Reputation maybe (I haven't actually started a play-through with it yet though). Honestly, I don't know what else I could have that would be causing my game to be unable to use 'script-heavy' mods.

Also, could I run more script-heavy mods if I had more RAM? I have been looking into getting some more RAM, but my hometown doesn't have any stores that sell RAM modules, so finding some has proven to be difficult.

[Grumpy]

script heavy describes a mod which have heavy performance impact on the script engine papyrus. papyrus is, similar to the physics, linked to the FPS and just have a certain amount of time to do it's stuff. adding more RAM to your PC will not help because papyrus has at some point limits you cant conquer.

Too much script heavy mods can lead to script lags, meaning you overloading papyrus with things to do and some of your ingame stuff will get completed with delay.

In my opinion, script heavy is the wrong term here, "mods with high script impact" or something like that would be more appropriate. a lot of beginner also think that, just because a mod has a lot of scripts it means simultanously, it's script heavy which is wrong. SL (the prime adult mod which enables all the others) as example is a mod with a very high amount of scripts, yet the script impact of that mod is not there.
Mods which do a crazy a mount of stuff at once or mods which permanently track the player or enviroement for some reason are one of the most used performance hogs for papyrus. Frostfall for example tracks all the time the various stats of that mod.

also keep in mind that script heaviness is to some sort relative. frostfall might be a script intensive mod, but as only mod (or with other non script heavy mods) it will not do much problems.

you can to test how script heavy your game is, with this mod: https://www.nexusmods.com/skyrimspecialedition/mods/24124 (Elephant's Script Latency Tester)