在PHP的大量请求期间防止超时

<?php
include 'echove.php';

$e = new Echove(
    'xxxxx','xxxxx'
);

// Read Video IDs
# Define our parameters
$params = array(
    'fields'         => 'id,referenceId'

);

# Make our API call
$videos = $e->findAll('video',$params);


    //print_r($videos);
    foreach ($videos as $video) {

        //print_r($video);
        $ref_id = $video->referenceId;
        $vid_id = $video->id;

        switch ($ref_id) {
            case "":
                $metaData = array(
                    'id' => $vid_id,'referenceId' => $vid_id
                );

                # Update a video with the new meta data
                $e->update('video',$metaData);                
                echo "$vid_id updated sucessfully!<br />";
                break;
            default:
                echo "$ref_id was not updated. <br />";
                break;
        }
    }
?>

谢谢！