Re: can someone explain why...
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- Subject: Re: can someone explain why...
- From: Thierry <th.douez@...>
- Date: Thu, 7 Oct 2010 10:57:19 +0200
>> Le 5 oct. 2010 à 14:27, Michal Kolodziejczyk a écrit :
> It is part of Lua Programming Gems:
> http://www.lua.org/gems/
Thanks.
By the way, I've just received the Programming in Lua 2nd edition.
Very good book.
Ok, my next neuronal-challenge as a Lua-learner :)
I have this simple script :
function m( x0, radius) -- radius : ~ 2 to 7
local t = {}
local N = 0
for x = x0-radius, x0+radius do
t[N] = get_val( x )
N = N + 1
end
table.sort( t )
.....
end
To speed it up a bit, I did replace :
local t = {}
by
local t = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
I gain around 20%.
Can you comment or give me better ways to optimize this kind of scripts
please, spare me writing this in C :)
it is called million of times, the whole process can be around 30 to 100 seconds
Regards,
Thierry