Comparison of speed and efficiency of three methods of generating XML files in PHP_PHP Tutorial

Comparison of the speed of three methods of generating XML files in PHP
There are three methods, namely writing directly; using DomDocument; using SimpleXML;
In fact, there is a fourth method: using XMLWriter, but I have never used it, so I’m too lazy to try it.
Mainly I want to see which of the three methods is faster
Directly enter the code:

Copy the code The code is as follows:

private function directWriteXml(&$data){
$xmltext='';
$xmltext .='';
$xmltext .='';
$loop=count($data);
foreach ($data as $d ){
$xmltext .=" ";
}
$xmltext .='';
$xmltext .='';
return $xmltext;
}
private function useDomDocument(&$data) {
// Create an XML document and set the XML version and encoding. .
$dom=new DomDocument('1.0', 'utf-8');
// Create root node
$detail01 = $dom->createElement('Detail');
$ dom->appendchild($detail01);
foreach ($data as $d) {
$row = $dom->createElement('Row'," ID=" {$d['id' ]} " Name=" {$d['name']}" " );
$detail01->appendchild($row);
}
return $dom->saveXML();
}
private function useSimpleXML(&$data){
// Create an XML document and set the XML version and encoding. .
$string = <<


XML;
$xml = simplexml_load_string($string);
foreach ($data as $d) {
$xml->addChild('Row'," ID=" {$d ['id']} " Name=" {$d['name']}" " );
}
return $xml->asXML(); ;
}

Add a large number of loop operations to each call and record the time

Copy the code The code is as follows:

$loop=10000;
$xml='';
switch($_GET['id']){
case 1:
$ts=$this->microtime_float();
for( $i=0; $i<$loop; $i++)
$xml=$this->directWriteXml($depdata);
$te=$this->microtime_float() ;
$t=$te-$ts;
$this->assign('times',$t);
$this->assign('method','write directly') ;
break;
case 2:
$ts=$this->microtime_float();
for( $i=0; $i<$loop; $i++)
$ xml=$this->useDomDocument($depdata);
$te=$this->microtime_float();
$t=$te-$ts;
$this->assign( 'times',$t);
$this->assign('method','DomDocument');
break;
case 3:
$ts=$this->microtime_float ();
for( $i=0; $i<$loop; $i++)
$xml=$this->useSimpleXML($depdata);
$te=$this-> microtime_float();
$t=$te-$ts;
$this->assign('times',$t);
$this->assign('method','SimpleXML ');
break;
}
echo $xml;

The actual test results are as expected, direct writing is the fastest, and the time consumption is only about 1/3 of other methods. The other two methods are similar, and SimpleXML is faster in comparison.

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