Array size and speed application

[Victorio]

Hi,
Why have negative effect to speed application used size of Array ?
In my program I have
DECLARE arow[20000000]

Then I use this arow to read lines from file in cycle
FOR i=1 to x
arow:=something...
NEXT

x can be 100000, 2.000.000 and so 20.000.000

If I declare to 2.000.000 program speed is about 3x speed then declare 20.000.000.

Can I set some dynamic declaration without set to fix number of array elements ?

[Leon Berger]

Hi,
Why have negative effect to speed application used size of Array ?
In my program I have
DECLARE arow[20000000]

Then I use this arow to read lines from file in cycle
FOR i=1 to x
arow:=something...
NEXT

x can be 100000, 2.000.000 and so 20.000.000

If I declare to 2.000.000 program speed is about 3x speed then declare 20.000.000.

Can I set some dynamic declaration without set to fix number of array elements ?

Yes, You can

Code: Select all

arow := {}, cstring := ""

open file
do while not end of file
   cstring := read line
   aadd(arow, cstring)
enddo
close file

[Victorio]

... aadd().. ok,

I tested it now, super !!! , time processing from 11 sec to 5sec.
I reprogramming old C++ utilities and always comparing time processing old C++ and alaska.
In this example time C++ utility is about 3sec, it is nearly alaska xbase result.

Thank you

[skiman]

Hi,

Maybe you can post your code. Perhaps it can be optimized to get even better results.