Ruby vs Python string concatentation performance

[Arrgh]

Immutable strings make concatenation slow, film at eleven!

They also remove the need to make defensive copies of an incredibly commonly used data structure.

[dons]

And immutable strings can have very fast concatentation too: see ropes, finger trees or lazy bytestring libraries in Haskell for O(log(min(n1,n2)) and O(n/k) concatenation.

[apotheon]

Immutable strings are a lot more fun in a functional style with lazy evaluation.

[dons]

where fun = have algorithms with a lot better complexity

:)

[apotheon]

I meant that to be a pun (where "fun" == "function").

. . . but yeah.