It is a very common misconception that xslt is solid brakes, and smarty is our everything. Let us put aside the laconicity of the smarti syntax and the convenience of supporting xslt, and direct our gaze precisely at the speed of their work.

We will draw something a little more complicated than “hello world” - a tree. This will prevent us from using copy-paste and will force reuse of the code for outputting nodes. Let them be a small number - 100 pieces.

Create a simple object data model.

class Thing {
        public $color, $shape, $childs= array();
        function getArrayData(){
                $childs= array();
                foreach( $this->childs as $child ) $childs[]= $child->getArrayData();
                $data= array(
                        'color' => $this->color,
                        'shape' => $this->shape,
                        'childs' => $childs,
                );
                return $data;
        }
        function getXMLData( $doc ){
                $node= $doc->createElement( 'thing' );
                $node->setAttribute( 'color', $this->color );
                $node->setAttribute( 'shape', $this->shape );
                foreach( $this->childs as $child ) $node->appendChild( $child->getXMLData( $doc ) );
                return $node;
        }
}

srand( 0 );
$things= array();
$colors= array( 'red', 'green', 'blue', 'yellow', 'magenta', 'cyan' );
$shapes= array( 'circle', 'ellipse', 'oval', 'rectangle', 'triangle', 'star', 'rhombus', 'trapeze', 'exploit<u>' );
for($i=0;$i<100;++$i){
        $thing= new Thing;
        $thing->color= $colors[ array_rand( $colors ) ];
        $thing->shape= $shapes[ array_rand( $shapes ) ];
        if( $i ){
                $things[ array_rand( array_slice( $things, 0, 10 ) ) ]->childs[]= $thing;
        };
        $things[]= $thing;
}

    : getArrayData      ,  getXMLData DOM.

 ,   DOM    3   . ,  -   .

XSLT

$t1= getTime();
        $doc= new DOMDocument;
        $data= $things[0]->getXMLData( $doc );
$t2= getTime();
        $doc->appendChild( $data );
        $xsl= new DOMDocument( );
        $xsl->load( 'tpl.xsl' );
        $proc= new XSLTProcessor( );
        $proc->importStyleSheet( $xsl );
        echo $proc->transformToXML( $doc );
$t3= getTime();

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
        <xsl:output method="html" />
        <xsl:template match=" thing ">
                <div style="color:{@color}">
                        <xsl:value-of select=" @color " />
                        <xsl:text> </xsl:text>
                        <xsl:value-of select=" @shape " />
                </div>
                <blockquote>
                        <xsl:apply-templates select=" thing " />
                </blockquote>
        </xsl:template>
</xsl:stylesheet>

: 3 + 5 = 8

Smarty

1. $t1= getTime();
2.         $data= $things[0]->getArrayData();
3. $t2= getTime();
4.         $smarty= new Smarty;
5.         $smarty->template_dir = '.';
6.         $smarty->compile_dir = '.';
7.         $smarty->assign( 'thing', $data );
8.         $smarty->display( 'tpl.smarty' );
9. $t3= getTime();

1. {function name="proc"}
2. <div style="color:{$thing.color|escape}">{$thing.color|escape} {$thing.shape|escape}</div>
3. <blockquote>
4.         {foreach from=$thing.childs item=child}
5.                 {proc thing=$child}
6.         {/foreach}
7. </blockquote>
8. {/function}
9. {proc thing=$thing}

: 1 + 20 = 21
______________________

PHP

$t1= getTime();
        $data= $things[0]->getArrayData();
$t2= getTime();
        include( 'tpl.php' );
$t3= getTime();

function akeurwbkurlycqvaelkuyrc( $data ){ ?>
        <div style="color:<?=htmlspecialchars($data['color'])?>">
                <?=htmlspecialchars($data['color'])?> <?=htmlspecialchars($data['shape'])?>
        </div>
        <blockquote>
                <? foreach( $data['childs'] as $child ) akeurwbkurlycqvaelkuyrc( $child ) ?>
        </blockquote>
<? } akeurwbkurlycqvaelkuyrc( $data );

: 1 + 2 = 3

function getTime(){
        return 1000 * microtime( true );
}

<div style="position:absolute;top:0;right:0">
        preprocessing: <?= $t2 - $t1 ?><br/>
        templating: <?= $t3 - $t2 ?><br/>
        total: <?= $t3 - $t1 ?><br/>
</div>

php 5.3.1, libxml 2.7.3, libxsl 1.1.23, smarty 3 rc2

   PHP   ,       DOM     .