[BUGFIX] Akismet check takes a lot of time

Resolves: #62238
Releases: 6.2
Change-Id: If30b76325e4673e04149a5305dfd1259ae982aa8
Reviewed-on: http://review.typo3.org/33310
Reviewed-by: Ralf Zimmermann <ralf.zimmermann@tritum.de>
Tested-by: Ralf Zimmermann <ralf.zimmermann@tritum.de>