Description:
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When using PHP 5.3 with Typo3 4.2.3, queries like 00912                 

$keyRes = mysql_query('SHOW keys FROM '.$tableName, $this->link);

takes a while to complete. More than 3-5 seconds.

I'm using the mysqlnd driver in Mac OS X Tiger with Apache 1.3.41



Reproduce code:
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Use Typo3, and load an extension in the CMS Backend. While this does run smoothly with PHP < 5.3, there is clearly a problem with my PHP version.

Even more: mtop show the related MySQL queries for a while (>1 second), even if it takes less than 0.1 seconds to complete in mysql client (or else).

Expected result:
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Queries completed in less than 0.1 seconds

Actual result:
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More than 3 seconds to complete, with strange behaviors such as 
connection dropped or else.