Description:
------------
as of writing, the example code for curl_multi_close is

<?php
// create both cURL resources
$ch1 = curl_init();
$ch2 = curl_init();

// set URL and other appropriate options
curl_setopt($ch1, CURLOPT_URL, "http://www.example.com/");
curl_setopt($ch1, CURLOPT_HEADER, 0);
curl_setopt($ch2, CURLOPT_URL, "http://www.php.net/");
curl_setopt($ch2, CURLOPT_HEADER, 0);

//create the multiple cURL handle
$mh = curl_multi_init();

//add the two handles
curl_multi_add_handle($mh,$ch1);
curl_multi_add_handle($mh,$ch2);

$running=null;
//execute the handles
do {
    curl_multi_exec($mh,$running);
} while ($running > 0);

//close the handles
curl_multi_remove_handle($mh, $ch1);
curl_multi_remove_handle($mh, $ch2);
curl_multi_close($mh);

?>

i believe this code will be stuck using all cpu it can on 
do{curl_multi_exec($mh,$running);}while($running>0);
part, until both curl handles are done..  and i believe a solution is 
curl_multi_select ; there already is example codes on curl_multi_exec / 
curl_multi_init that use curl_multi_select to do non-busy-waiting (or whatever 
it's called, idk), maybe copy&paste the example code from 1 of those?

Expected result:
----------------
small cpu usage

Actual result:
--------------
high cpu usage