[Plugin: WordPress File Monitor] To much GPU

I had to disable the plugin because it became the #1 resource hog on my mediatemple grid hosting account. From the MediaTemple GPU reports:

Method [?]	Path [?]	HTTP response [?]	Hits [?]	IORead [?]	IOWrite [?]	GPUs / hit [?]	%of total [?]	GPUs [?]
GET
<my site>/wp-content/plugins/wordpress-file-monitor/wordpress-file-monitor.php
200	5188	1900864	365296	0.0142	9.16%	73.4415

It means that 10% of all GPU on the account was absorbed by this plugin, to make it worse, I had it activated in multiple blogs, all summing up:

GET
<another_blog>/wp-content/plugins/wordpress-file-monitor/wordpress-file-monitor.php
500	93	37968496	0	0.2267	2.63%	21.0849

So I really like this Idea but maybe another solution is needed. I think I might have to resort to writing a perl script to do the same or resort to https://sourceforge.net/projects/tripwire/ but that looks daunting to install.