Wusage is too resource intensive

When I run the statistics program wusage on my server, it brings the load to about 3 for a period of more than an hour. This high load is unaccpetable because it significantly slows down my forum. I usually end up killing wusage before it finishes.

What can I do to make wusage less resource intensive, aside from upgrading the server? I am already running the program at the slowest time during the night. Ideally, I would want the server load to never exceed 1.

 

 

 

 

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