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+--- Thread: Memory Leak, or Coding problem ? (/showthread.php?tid=6879)
Memory Leak, or Coding problem ? - El Forum - 03-15-2008
[eluser]n8m[/eluser]
Hi all,
while testing my Application, I just stumbled over something. I used the profiler to see how many memory my application will need. After a bit of navigating on this page, I found out that the memory usage constantly began to raise. Since this page will be used by many (many) people, this can be a problem.
What I do on this page is open and parse xml files with simplexml and the usual usermanagement stuff with a database. It would be nice if someone can tell me if this has something to do with my programming, or if this is something dependend on Codeigniter.
Thanks in advance,
n8m
Memory Leak, or Coding problem ? - El Forum - 03-16-2008
[eluser]Matthew Lanham[/eluser]
How big are the XML Files.... if they are quite big, then they have to be loaded into memory with simplexml and this can start to add up...
Memory Leak, or Coding problem ? - El Forum - 03-16-2008
[eluser]n8m[/eluser]
not so big ('bout 700 Bytes). It's just a Menue, and some random Data. What I did now, is unset all simple XML Objects. But never the less, my page is Using 1Mb of Ram without much GfX.
Memory Leak, or Coding problem ? - El Forum - 03-16-2008
[eluser]Matthew Lanham[/eluser]
Well it shouldn't be using that much ram, however simpleXML is pretty memory intense, and its fairly slow aswell, you might want to look into a SAX parser, i had one kicking around i found that we use on a huge project over 3.4 million records split into multiple xml files of 50,000 and the SAX parser is a HUGE amount faster, and doesnt need as much ram, as it only loads in blocks, where as simpleXML loads the whole file into memory....
Just found the link:
http://code.google.com/p/pushxml/
Uses a SAX parser to pass back an object just like using simpleXML but better, give it a whirl and let me know if this helps.
Memory Leak, or Coding problem ? - El Forum - 03-16-2008
[eluser]n8m[/eluser]
I'll give it a try as soon I got time. Right now I just unset the simpleXML object directly after using it. The performance is ok so for. But shurely simpleXML is nothing for big XML files. I will take a look at some sax php stuff later (when i've got more time). Right now this has to be done till tomorrow
.I tried pushxml, but the demo has a small error and right now I don't have the energy to debug other code then mine. But thnx anyway- this project looks quite promissing. I'm shure that was only a minor error.
Thnx
n8m
Memory Leak, or Coding problem ? - El Forum - 03-16-2008
[eluser]Matthew Lanham[/eluser]
Good luck, as i say we use it and i cant recall any errors, but not sure!