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How much data could be written in an XML file, that a specific child could be found and read as fast as i.e. an XML file with only a few lines?
I mean, weather it is logic, if I save some millions of data as millions of childes in one XML file, which will be used in php-based web-pages?
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link: A limiti for XML - O'Reilly Answers
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Answered by
arjonesiii
Posted Aug 31 2010 10:50 AM
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A limiti for XML
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Answered by
arjonesiii
Posted Aug 31 2010 10:50 AM
Increasing XML file size always increases the time to find an individual node; however, how much it increases it depends on several factors, including not only the file size, but disk speed, processor speed, encoding, the content itself, and how you intend to use the file. For example, if you need to open the file and find a node only rarely, you can simply read through it linearly, reading the nodes in sequence, and extracting the data you need when you find the appropriate node. Using this method, a node near the beginning of the file can be found faster than one toward the end. In contrast, if you need to query the file often, it's usually faster to load the entire file into memory, parsing the nodes, and then performing searches. The first such search will require loading and parsing the file, so it will be slower. Subsequent searches will be much faster, and node position is relatively unimportant for search performance. When you get to the realm of millions of nodes, you're going to get much better average performance with a relational database or a native XML database. For more information, explore SAX and DOM processing, and see this page for performance tips: https://xerces.apache...rformance.html.
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