[TYPO3-english] google sitemap - tx_ddgooglesitemap_lastmod

[Goku]

Hi,
I've a performance problem after installation of Google sitemap Extension 
( dd_googlesitemap ) 1.0.3.
Every time I make a change in the backend CMS becomes slow and the log shows 
hundreds of records like this:
Record '« MYFinder « LUX « ' (pages:4) è stato aggiornato. Changes in 
fields: tx_ddgooglesitemap_lastmod.  (msg#1.2.10)

My Typo3 version is 4.1.7.
Thanx for help

Goku