LSL Constants vs Globals

From Second Life Wiki

There are some advantages in using global variables over the string and key constants, it's faster and uses less bytecode when it is longer then 3 characters and it used more then twice but it uses more bytecode when it is shorter then 3 characters or it used once. This is easily demonstrated by running the scripts in Figure 1.

Pros

• Faster
• Uses less bytecode when it is longer then 3 characters and it used more then twice.

Cons

• User can accidentally change the value.
• Uses more bytecode when it is shorter then 3 characters or it used once.

 
 
dead(){
    key a = NULL_KEY;
    key b = NULL_KEY;
    key c = NULL_KEY;
    key d = NULL_KEY;
}
 
default {
    state_entry() {
        llOwnerSay((string) llGetFreeMemory());
    }
}

key null_key = NULL_KEY;
 
dead(){
    key a = null_key;
    key b = null_key;
    key c = null_key;
    key d = null_key;
}
 
default {
    state_entry() {
        llOwnerSay((string) llGetFreeMemory());
    }
}