I simply started 5 instances of the default xterm, doing nothing in them at all.Looking at the output from htop, it appears that these instances use different amounts of RAM:VIRT        RES       SHR       Command12632       8528      4916       xterm12632       8528      4920       xterm12616       8496      4900       xterm12616       8464      4868       xterm12616       8452      4856       xtermI know the differences are slight, but it does peak my curiosity.  Google was unhelpful.  Does anyone know why there are these small differences?
Why do different instances of the same program use up different amounts of memory?
memory;ram