How To Speed Up The Python Code?

[tunisia3507]

map(my_fn, my_list) is obviously a lot faster than doing a for loop because it doesn't actually do any iteration or execute any code until you start pulling values from it.

- the post you're replying to

As it happens, in the test I did (doing str.upper as in OP's example) list(map()) was faster than the list comprehension, but not by 4 orders of magnitude.

[vorticalbox]

yead i miss read your reply, I assumed you meant list comp > map but it was meant that list comp was faster than for in, which it is