First, see this question about space usage on Stack Overflow: http://stackoverflow.com/questions/3254758/memory-footprint-of-haskell-data-types
Next, apply this knowledge not only to Ints, but also to tuples and lists. There's your memory usage. - Jake On Wed, Feb 1, 2012 at 10:29 AM, Johan Brinch <brin...@gmail.com> wrote: > Here's the example program: > https://gist.github.com/1cbe113d2c79e2fc9d2b > > When I run the program (which maintains a list inside an STM TVar), I > get the following statistics: >> ./Test +RTS -s > 176,041,728 bytes allocated in the heap > 386,794,976 bytes copied during GC > 69,180,224 bytes maximum residency (7 sample(s)) > 42,651,080 bytes maximum slop > 179 MB total memory in use (0 MB lost due to fragmentation) > > Tot time (elapsed) Avg pause Max pause > Gen 0 336 colls, 0 par 0.44s 0.44s 0.0013s 0.0033s > Gen 1 7 colls, 0 par 0.39s 0.40s 0.0570s 0.1968s > > INIT time 0.00s ( 0.00s elapsed) > MUT time 0.23s ( 0.23s elapsed) > GC time 0.83s ( 0.84s elapsed) > EXIT time 0.00s ( 0.00s elapsed) > Total time 1.06s ( 1.07s elapsed) > > %GC time 77.9% (78.3% elapsed) > > Alloc rate 749,153,093 bytes per MUT second > > Productivity 22.1% of total user, 22.0% of total elapsed > > > How come this program uses 179 MB of memory? I'm on a 64-bit machine > where 2'000'000 integers uses 32 MB. Where does the overhead come > from? > > -- > Johan Brinch > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe