Does it matter if you have a local declaration in a loop?

[monkeybot]

i was wondering if it matters,time wise,if you have a local declaration in a loop?
so i knocked this up the second loops always seems to complete slower than the first by 200>300 ms so is it in fact faster to declare vars in a loop?(seems unlikely!)

Code Select Expand

repeat
t=timer()
for q=0 to 10000
local a=1
local b=1
local c=1
local d=1
cls
print a+b+c+d+q
sync
;r=a+b+c+d+q
next
t1=timer()-t


t=timer()
for q=0 to 10000
cls
print a+b+c+d+q
sync
;r=a+b+c+d+q
next
t2=timer()-t
cls
print t1
print t2
sync
waitkey
until false



[kevin]

 

if you have a local declaration in a loop?

 Nope.

 These produce exactly the same code,

PlayBASIC Code: [Select]

       local A=2
       A=2
 

your example code isn't timing loops, it's timing syncs.   Every time you sync,  the VM process is released and winblows takes over again..  

PlayBASIC Code: [Select]

Maxtests=100000

repeat

   cls 
   frames++

   t=timer()
   for q=0 to Maxtests
      local a=1
      local b=1
      local c=1
      local d=1
   next
   t1#+=timer()-t

   t=timer()
   for q=0 to Maxtests
      d=1
      e=1
      f=1
      g=1
   next
   t2#+=timer()-t
   print t1#/frames
   print t2#/frames

   sync
until false

[monkeybot]

ahh.oh yes.
Thanks