return statement approaches - cons and pros

Which return style in your opinion is „better”, more universal? For example, for this operation:

foo.filter(...).map(...).reduce(...)...

We have:

1st approach

const result = foo.filter(...).map(...).reduce(...);

return result;

2nd approach

return foo.filter(...).map(...).reduce(...);

If it comes to 1st approach I think it’s more readable if we have long code which result is stored in variable. But in 2nd option we don’t have extra variable, so we save memory a bit. Do you know any other cons nas pros? Which style should I use?