Thanks Mike
On 12/12/2008, at 2:24 AM, Michael Ash wrote:
On Thu, Dec 11, 2008 at 1:00 AM, Kieren Eaton <kier...@gmail.com>
wrote:
Hi All
I know there are always several ways to do things and have come
across
something which puzzles me as to
the efficiency of these 2 ways of getting the same data from an
NSXMLNode
object.
for this exercise assume theNode is an NSXMLNode object which has
been
initialized and contains data and an attribute called class with
something
in it.
Scenario 1
NSXMLElement *nodeAsElement = (NSXMLElement *)theNode;
NSString *attribContent = [[nodeAsElement attributeForName:@"class"]
stringValue];
NSLog(@"class contains %@",attribContent);
Scenario 2
NSString *attribContent = [[theNode objectsForXQuery:@"data(@class)"
error:nil] objectAtIndex:0];
NSLog(@"class contains %@",attribContent);
these will and do produce the same data but for my own personal
knowledge I
would like to know which is more efficient.
I use both in my code but am leaning more towards the xquery style
for
readability and maintainability of larger more nested structures.
Comments appreciated
I'd guess that #1 is going to be faster, simply because #2 has to
parse the string and #1 does not.
However, does it matter? Unless you're doing this over and over again
in a tight loop, it probably doesn't make any difference which one you
use, so go for the one you think is more readable.
The strng gets checked on a random basis from about every couple of
seconds to a couple of minutes depending on the length of the audio
its associated with.
Thanks and I am using the more readable version with comments of course.
Kieren
If it really does make a difference then you're in a perfect situation
to find out for yourself. Try both, and measure how much time each one
takes, and you will have your answer.
Mike
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