Patrick,
GLOBAL var has similiar speed to STATIC var, then if you have any extra
code to access to var that code is slower.
GLOBAL var is faster and les expensieve than access to STATIC Var with a
function.
Walter Negro
Patrick Mast, xHarbour. escribió:
Hey Walter,
Thanks for the explanation.
Now, what is faster and les expensive:
Using a GLOBAL Var or a STATIC Var from with in a function.
Function myVar(n)
STATIC myVar:={1,2,3,4,5}
RETURN myVar[n]
Patrick
On Sun, Nov 16, 2008 at 11:59 AM, Walter Negro <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Patrick
Patrick Mast, xHarbour. escribió:
Hi,
In the "old" Clipper days we where told to NOT overuse PUBLIC
or PRIVATE variables because they consume lots of memory and
are slow. How is this in xHarbour? Is this still true?
The PUBLIC and PRIVATE vars share space in the symbol table. The
max size in Clipper for this table is 64k, but in xHarbour the
limit is 2Gb, then we can use PUBLIC and PRIVATE vars without
problem.
And, is a PUBLIC var more 'expensieve' than a PRIVATE var?
No. PRIVATE var is more "expensive" than PUBLIC, not in access but
in creation and destruction.
The PUBLIC vars are created once, but PRIVATE vars are created in
each function.
The PRIVATE vars need to be cleaned at the end of function.
Is it less 'expensive;' to have ONE public var with an array
of lets say 100 elements or 100 separate public var's?
Access to array is more "expensive" than access to PUBLIC or
PRIVATE var.
Access to PUBLIC var use two PCODE.
Access to array in PUBLIC var use four PCODE.
Thanks!
Patrick
Walter Negro
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