Javascript VM performance is what makes a computer seem fast these days. People talk about being able to use a C2D still or even a Pentium 4, they&#x27;ll go on and on about how a 8-10 year old machine is still usable.<p>But even a not-quite 8 year old Penryn system with 4GB of RAM and an SSD is going to chug and chug on today&#x27;s websites. The same site is pretty decent on a recent i3&#x2F;i5 but it&#x27;s painful to use those older C2D systems these days.