list addition methods compared.

[Terry Reedy]

"Ishwor" <ishwor.gurung at gmail.com> wrote in message 
news:34534aed0412252012638c85fd at mail.gmail.com...
> Hi all
> I have just wrote a small script to compare the speed of list addition 
> methods.

There are two meanings of 'list addition':

li = li+[item] *copies* the list and adds item

li += [item] is the same as li.extend([item]) which add item to the end of 
the list *without* copying.

Of course, extending a list is faster than copying + one more.

Terry J. Reedy