[Haskell-cafe] Library sizes (was: Toy application advice wanted)
kopnicky at cse.ogi.edu
Wed May 5 12:38:02 EDT 2004
I don't want to pick on any particular library, as this issue can pop up
with any library in any language. I feel it's an issue which has been
addressed before, but the solutions are largely ignored. This is most
likely because 1) people assume we have plenty of space or 2) the
library isn't yet complete, and it's easier to statically link a big
library for now, and worry about alternatives later. If I were writing
a library, I probably wouldn't be too concerned with the issue myself.
It seems there are two ways to address this problem:
1) Shared libraries. Why not link the library dynamically instead of
statically? Is this possible with GHC? Then multiple applications
using the library wouldn't balloon the memory use, but share a copy of
the same library. For simple development and testing, it's easier to
statically link, since we only have to worry about one file. But if we
expect people to run many programs using this library, we ought to be
more careful about space usage. Dynamic linking ought to be an option.
2) Linking in only what's used. If a simple 'Hello, World!' program
only needs a window and some buttons, why link in all the code for other
widgets? Is there a library format which allows pulling out only those
operations which are needed? An alternative is to recompile the library
code with the program each time, throwing away dead code - that is, the
library code which is never called. Recompiling the library code with
the application takes longer, but need only be done once the program is
ready for distribution.
If anyone knows of existing solutions in either of these areas, please
- Lyle Kopnicky
Duncan Coutts wrote:
>On Wed, 2004-05-05 at 16:24, Andrei de A. Formiga wrote:
>> I'm finding wxHaskell very nice, and a wxWidgets
>>binding is something many other "advanced" languages
>>don't have (even OCaml). The only downside is having a
>>'Hello World' GUI application with 7 Mb... but it runs
>>quite well and smooth once it's loaded.
>We have the same problem with gtk2hs. A stripped simple(ish) prog weighs
>in at about 2.5Mb.
>I'm not quite sure what's in there that makes it so big.
>Haskell-Cafe mailing list
>Haskell-Cafe at haskell.org
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