Description:
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OK, this is a strange one.  If you have CURL and either the php_mysql or  php_pdo_mysql extensions active, then PHP (command line) will hang for about 5 seconds before actually exiting the script.

This is especially problematic in a CGI scenario, because the connection to the browser isn't closed during this delay and it looks like the request isn't complete.

The problem goes away if I comment out the Mysql extensions in my ini file.


Reproduce code:
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<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://www.php.net');
curl_exec($ch);
curl_close($ch);
echo 'done';
?>


Expected result:
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Running this from the command line, you would expect PHP to exit right after the word 'done' is printed.


Actual result:
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There is about a 5 second delay between the time the word 'done' is printed and PHP returning control to the command line.