Memory ​

Everything you build ends up inside Second Life scripts, and scripts have a hard limit of 64 KB. To keep your HUD from crashing, the panel measures your project in memory units and refuses to save past your plan's limit. The Script Memory bar in the left column shows where you are.

Limits ​

The panel allows a small tolerance (500 units) beyond the limit before it refuses to save. Each single function is capped at 1,200 units of actions.

What costs memory ​

Cost of each action ​

Action	Category	Plan	Memory	Notes
Give Items	Object Control	PRO	400
Open URL	Sound, Chat & Animation	PRO	200
PBR Custom	Textures & Materials	FREE	85
Blinn-Phong	Textures & Materials	FREE	70	Advanced properties add a few units for each changed value.
Message	Sound, Chat & Animation	FREE	70	+1 unit per character of the message.
Rotate	Move & Resize	FREE	50
Position	Move & Resize	PRO	50
Object Size	Move & Resize	PRO	50
Resizer	Move & Resize	PRO	50
Color	Color & Light	FREE	40
Point of Light	Color & Light	PRO	40
Animation	Sound, Chat & Animation	PRO	40
Object Animation	Sound, Chat & Animation	PRO	40
Condition	Flow & Logic	FREE	40
Material PBR	Textures & Materials	FREE	30
PBR On/Off	Textures & Materials	PRO	30
Glow	Color & Light	PRO	30
Full Bright	Color & Light	PRO	30
Activate Function	Flow & Logic	PRO	30
Send Command	Flow & Logic	PRO	30
Sound	Sound, Chat & Animation	FREE	25
Timer	Flow & Logic	PRO	25
PBR Alpha Mode	Textures & Materials	PRO	20
Ghost Object	Move & Resize	PRO	20
Detach	Object Control	PRO	20
Delete Object	Object Control	PRO	20
Alpha Mode	Textures & Materials	PRO	15
Transparency	Color & Light	FREE	15
Change Variable	Flow & Logic	FREE	10

Reading the numbers ​

A 20-button texture HUD, one Blinn-Phong action each:

20 functions × 30      =   600
20 Blinn-Phong × 70    = 1,400
Attach event (empty)   =    30
                         ─────
                         2,030 units   → fits FREE (5,100)

The same HUD with a click sound and a message in every button:

20 × (30 + 70 + 25 + 70 + ~20 chars) ≈ 4,300 units   → close to the FREE limit

With a helper fx_click holding sound + message, called from each button:

helper: 30 + 25 + 70 + 20         =   145
20 × (30 + 70 + 30 [activate])    = 2,600
                                    ─────
                                    2,745 units

How to save memory ​

1. Helper functions for anything repeated (Helper Functions).
2. Short messages. Every character counts.
3. ALL faces / ALL LINKS instead of several actions for individual faces, when the result is the same.
4. Delete unused functions and events. An empty event still costs 30.
5. Few variables. Each one is 30 units, and they are only needed for logic.
6. Open URL is expensive (200). One link button is fine; twenty are not, on FREE.

Memory inside Second Life ​

The panel's units are an estimate of the bytes the scripts will hold. The real scripts (*FUNCTIONS, *TARGETS, PBR Manager) run close to their 64 KB ceiling by design, which is why the limits exist. If you ever see a Stack-Heap Collision error from a 1Click script in-world, the object holds more than it can handle: reduce the project and build again, and tell us about it.