On Tue, Mar 23, 2010 at 05:53:00PM +0000, Vincent Hanquez wrote:

On 23/03/10 17:11, Iustin Pop wrote:

...

Data.ByteString.Lazy (bytestring readFile + length) -< 10 miliseconds, incorrect length (as expected).

Data.ByteString.Lazy.UTF8 (system readFile + fromString + length) - 11 seconds, correct length.

Why would you use system readFile and not bytestring readFile in the second case ?

using the later i got a ~48x slowdown, not a >1100x slowdown, and the length is correct too.

Hmm… because I didn't think of that :) iustin