map and filter with list comprehensions
Fri Sep 20 13:58:38 CEST 2002
Håkan Stenholm <> writes:
> If memory serves right, the reason used to be that list comprehension
> was slower than the recursiv version - this was true in R6 (R5 ?) and
> earlier, but nowdays there should be no major difference.
Yes, that is correct.
Nowadays lists comprehensions are transformed to a recursive function.
List comprehensions used to be very slow because the were transformed
to a recursive fun, and fun calls too used to be a lot slower than
they are today.
Björn Gustavsson Ericsson Utvecklings AB
+46 8 727 56 87 125 25 Älvsjö
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