Objective-C Implementation pointers

I am currently writing an XML parser that parses a lot of data, with a lot of different nodes (XML is not developed by me and I have no control over the content ...)

Anyway, it currently takes an unacceptably long time to load and read (about 13 seconds), so I am looking for ways to improve read performance.

I wrote a function to generate hash values ​​so that the program no longer needs to do a lot of string comparisons (just NSUInteger comparisons), but that still doesn't reduce the complexity of reading in ...

So I thought maybe I can create an IMP array so that then I can do something like:

for(int i = 0; i < [hashValues count]; i ++)
{
    if(currHash == [[hashValues objectAtIndex:i] unsignedIntValue])
    {
        [impArray objectAtIndex:i];
    }   
}

      

        
        
        
      

    

Or something like that.

The only problem is I don't know how to actually make the call to the IMP function?

I read that I am executing a selector that defines the IMP by going

IMP tImp = [impArray objectAtIndex:i];
tImp(self, @selector(methodName));

      

        
        
        
      

    

But, if I still need to know the name of the selector, what's the point?

Can someone help me with what I want to do? Or even a few more ways to improve the analyzer's efficiency ...

Here are some excerpts from my NSXMLParser delegate: From didStartElement

if([elementName isEqualToString:@"playingFilmData"])
{
    appDelegate.arrPlayingFilms = [[NSMutableArray alloc] init];
appDelegate.arrSessionTimes_ByFilm = [[NSMutableArray alloc] init];
appDelegate.arrSessionTimes_ByCinema = [[NSMutableArray alloc] init];
[self releaseData];
return;
}
else if([elementName isEqualToString:@"film_sessions"])
{
    aFilm.arrSessions = [[NSMutableArray alloc] init];
    [self releaseData];
    return;
}
else if([elementName isEqualToString:@"session"])
{
    aSession = [[ATM_SessionObject alloc] init];
    aSession.session_filmID = aFilm.film_id;
    [self releaseData];
    return;
}
else if([elementName isEqualToString:@"sess"])
{
    aFilm.arrSessions = [[NSMutableArray alloc] init];
    [self releaseData];
    return;
}
else if([elementName isEqualToString:@"cin"])
{
    cinID = [attributeDict objectForKey:@"id"];
    [self releaseData];
    return;
}
else if([elementName isEqualToString:@"s"])
{
    aSession = [[ATM_SessionObject alloc] init];
    aSession.session_filmID = aFilm.film_id;
    aSession.session_cinemaID = cinID;
    [self releaseData];
    return;
}
else if([elementName isEqualToString:@"flm"])
{
    aFilm = [[ATM_FilmObject alloc] init];
    aFilm.film_id = [attributeDict objectForKey:@"id"];
    aFilm.film_epNum = 0;

    [self releaseData];
    return;
}

[self releaseData];

      

        
        
        
      

    

From didEndElement

/*
 *0 = nowShowing_lastUpdate
 *1 = s
 *2 = tit
 *3 = des
 *4 = rate
 *5 = dir
 *6 = act
 *7 = rel
 *8 = flm
 */

NSUInteger numHash = [appDelegate murmerHashKey:elementName WithLegth:[elementName length] AndSeed:42];

if(currentElementValue)
{
if(numHash == [[hashValues objectAtIndex:0] unsignedIntValue])
{
    appDelegate.strNowShowingUpdate = currentElementValue;

    self releaseData];
    return;
}
else if(numHash == [[hashValues objectAtIndex:1] unsignedIntValue])
{
    [aFilm.arrSessions addObject:aSession];
    [appDelegate.arrSessionTimes_ByFilm addObject:aSession];

    [aSession release];
    aSession = nil;
}
else if(numHash == [[hashValues objectAtIndex:2] unsignedIntValue])
{
    [aFilm setValue:currentElementValue forKey:@"film_title"];

    [self releaseData];
    return;
}
else if(numHash == [[hashValues objectAtIndex:3] unsignedIntValue])
{
    [aFilm setValue:currentElementValue forKey:@"film_description"];

    [self releaseData];
    return;
}
else if(numHash == [[hashValues objectAtIndex:4] unsignedIntValue])
{
    [aFilm setValue:currentElementValue forKey:@"film_rating"];

    [self releaseData];
    return;
}
else if(numHash == [[hashValues objectAtIndex:5] unsignedIntValue])
{
    [aFilm setValue:currentElementValue forKey:@"film_directors"];

    [self releaseData];
    return;
}
else if(numHash == [[hashValues objectAtIndex:6] unsignedIntValue])
{
    [aFilm setValue:currentElementValue forKey:@"film_actors"];

    [self releaseData];
    return;
}               
}

if(numHash == [[hashValues objectAtIndex:8] unsignedIntValue])
{
[appDelegate.arrPlayingFilms addObject:aFilm];

[aFilm release];
aFilm = nil;

[self releaseData];
return;
}

[self releaseData];

      

        
        
        
      

    

Hope this helps shed some light on what I am doing wrong. As I said, I am new to this area of ​​programming (and in fact, I am actually a mathematician, not a programmer, practicing ...), so I am very enthusiastic about learning what to do !! / p>