twitter tools plugin causing high CPU

I had an increase amount of CPU usage (10x more than normal). After several days of troubleshooting, I linked it to the twitter tool plugin. After removing it, it seems that the CPU usage went back to normal. I am not 100% sure if the twitter plugin was the issue, since I made numerous other changes at the same time.
Has anyone experienced similar issue with this plugin? Is there another (proven) alternative to post to twitter from wordpress?
Thanks!