So yesterday I fired up Eclipse, I did SVN update on my project and I ran the ant. And it took unusually long time to finish. 10 minutes! At some points, Eclipse occupied so much computing resource that it brought my computer to an unresponsive state. Mouse clicks would not respond. Neither would keyboard presses. I took print screen of the resource usage and it surprised me to see that java (Eclipse) occupied 228% of CPU. How could that be? 228%? Well I have quadcore processor, so does it mean that the maximum CPU percentage would be 400%? I also noticed that the signjar target of the ant was the most resource consuming. Following are the screenshots: