MultiDimensional Arrays

[Velox Cruentus]

Ah. Yea... They are 8 bits. I thought it was 4 bit before. :-/

I meant 'number'.

[Evil_Trunks]

Originally Posted by Velox Cruentus

Of course -- Digits take a lot less space then letters. It's pretty much known. Take this for example:

(-- binary, 2 bytes in length --)
5 (5) = 0000 0101
A (65) = 0100 0001

Now... Which one do you think has the least data to support? Plus they have to mention that the latter binary is a string. More calculations to make... Funness.

I am saying that I think the engine internally converts a numeric array to a string list if you try to store characters in the array, causing a drastic speed reduction

Of course that is just my speculation, and only Stefan can really say (*nudge*)

[Admins]

Originally Posted by Evil_Trunks

I am saying that I think the engine internally converts a numeric array to a string list if you try to store characters in the array, causing a drastic speed reduction

It is using floating point (64 bit) values, strings, lists or pointers depending on what variables you add to the array. A floating point value is only converted to string if you request it as string, e.g. if you output the value with echo/sendtonc.

Speed comparisons: String lists on serverside are really slow right now, although you need to use quite huge string lists to see a speed difference in the script. The string lists are more optimized on clientside. Also numeric arrays are much faster.
In new scripting engine it is using the same mechanism for normal numeric arrays and for string lists. They are probably slightly slower than numeric arrays (10-20%), but of course much faster than string lists. With Graal version 4 you also have the advantage that the script engine is coded in C/C++, so even numeric arrays should be faster than with v2.

[Admins]

Bad code detected:
Initializing multi-dimensional arrays is done like this


arr = new[2][2][2]


You can also intiialize the subarrays manually e.g. to get different sized subarrays, but stuff like new[2,2] will not work

[Kaimetsu]

Originally Posted by Stefan

Bad code detected

Yeah, my bad. I've never ever used multidimensional arrays in C, so I forgot how the syntax worked. In my opinion, the [x,y] syntax makes more sense when the created array is a contiguous block of memory, but that doesn't really apply to Graal.