Php Infinate在平板电脑上滚动，同时使用Json提取内容

我使用scrollExtend插件调用一个Json脚本，它将吐出我的内容。 这在台式机上运行良好，但我的网站响应迅速，我也需要这项功能在平板电脑和移动设备上运行

我进行了大量测试，并将测试范围缩小到Json脚本：

    <?php

    $parent_query = bb_query("SELECT f_children
        FROM t_articles
        WHERE f_id= '85' and (f_removed IS NULL or f_removed ='0')
    ");
    $parent_row = bb_fetch_assoc($parent_query);

    $children = explode(':',$parent_row['f_children']);

     $i= 1;

        $rowsperpage = 6;    
        $totalpages =  count($children);            
        $_SESSION['highlights_current_page']++;         

        if (isset($_SESSION['highlights_current_page']) && is_numeric($_SESSION['highlights_current_page'])) {
           $currentpage = (int) $_SESSION['highlights_current_page'];
        } 

        if ($currentpage > $totalpages) {$currentpage = $totalpages;} 
        if ($currentpage < 1) {$currentpage = 1;} 

        $offset = ($currentpage-1) * $rowsperpage;    

        $x=0; 
        ##take off earlier articles
        while($x < $offset){
            array_shift($children);
            $x++;
        } 

        ##take off later articles
        $children = array_slice($children, 0, $rowsperpage);


echo $_SESSION['highlights_current_page'];    
echo "current:".$currentpage; 
echo "total:".$totalpages; 
echo "offset:".$offset; 


    foreach($children as $child)
    {  

    $child_query = bb_query("
       SELECT *
        FROM t_articles
        WHERE f_id = {$child}
        and (f_removed IS NULL or f_removed ='0') 
        AND f_live ='1' 
     ");

    while ($row = bb_fetch_assoc($child_query)){

    //data for echoing the articles

    }   
    }

    ?>