Update JSON.ahk

[robertlzj]

Get the character code in hex derectly! Only need to replace "0x" to "\u".
Much faster I think!
Test:

s:=0x12AB
SetFormat, IntegerFast, hex
b:=A_TickCount
    Loop 1000000{
        ;~ y:="\u",n := 12
        ;~ while(n>=0)
            ;~ y.= Chr((x:=(s>>n) & 15) + (x<10 ? 48 : 55))
            ;~ ,n-=4
        ;10438 ms

        y:="\u" SubStr(s,3)
        ;812
    }
MsgBox % A_TickCount-b

I don't know, how to get NumberType of SetFormat for restore later?
My ask in fourm.

[robertlzj]

I didn't test it.
I had just saw a share of the method above from a post in ahkscript.
I learn much from the few lines (just in scope of while)! Thank you.