Factory should use canonical directory names

[j-d]

I had a performance issue with PHPUnit today. It was related to code coverage and folders that are excluded. This is the relevant section from my phpunit.xml file:

    <filter>
        <whitelist>
            <directory>.</directory>
            <exclude>
                <directory>vendor</directory>
            </exclude>
        </whitelist>
    </filter>

Changing vendor to ./vendor causes a considerable performance increase.

Factory should use canonical names so it can properly exclude folders. Alternatively, the documentation could be improved to account for this scenario.

Thanks