This is the second time you said that in this thread, now I can't restrain myself anymore - 'list' != 'array', and it all depends on how they're implemented; I see no reason to assert that for 'most implementations' removing from the end is faster. For a single linked list, it's faster to remove from the start. For a double linked list, it doesn't matter (well it depends, it could be slower). For a 'we call it a list but all containers are really hashes', it doesn't matter. For a regular C array, it depends on how you work with it.
"Lists" in python are not in fact lists (as the term is traditionally used to refer to linked lists). They are array backed. I expect "arrays" in javascript are similarly arrays...
roel_v is correct to point out this misunderstanding.
