Do "Notice" and "warnings" slow a PHP script, with no error reporting?

Do "Notice" and "warnings" slow a PHP script, with no error reporting?

I once did a test for this, and the difference in execution time was negligible.
I am still curious though.

If error_reporting is set to zero, and "notice" errors are getting generated, does it matter much?

This code for example will generate NOTICE errors:

<?php

$a=array( 'red'=>255, 'green'=>200, 'blue'=>100 );
echo $a[red].'<br />'; //Notice error
echo $a['green'].'<br />'; //notice error
echo...

Code (markup):

Do "Notice" and "warnings" slow a PHP script, with no error reporting?

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