Re: [Haskell-cafe] big array allocation too slow?

wow, using newArray_ and initialize the whole thing myself is much faster than newArray. But why? On 9/18/09, Don Stewart wrote:

ninegua:

...

I'm trying to use newArray to allocate something that has 100M unboxed doubles. It takes quite a few seconds to do so on GHC 6.10.2. But doing the same thing (and initialize all to 0) in C returns immediately. Setting RTS heap size doesn't help. Does anybody happen to know why?

Use newArray_ to avoid initialising it.

-- Regards, Paul Liu Yale Haskell Group http://www.haskell.org/yale