[Haskell-cafe] ansi2html - one program, several issues

Krzysztof Skrzętnicki gtener at gmail.com
Sat Jul 19 19:11:33 EDT 2008

On Sun, Jul 20, 2008 at 12:34 AM, Bulat Ziganshin <bulat.ziganshin at gmail.com>

> Hello Krzysztof,
> Sunday, July 20, 2008, 1:55:45 AM, you wrote:
> >>> 532 MB total memory in use (4 MB lost due to fragmentation).
> i think that Parsec library should hold entire file in memory only when
> you use 'try' for whole file. otherwise it should omit data as
> proceeded
That's exactly what I thought. But even if I remove the only 'try' I use the
memory consumption remains unchanged:

duzy.log +RTS -sstderr
File duzy.log processed. It took 5.046875s. File size was 4166578
   3,950,649,704 bytes allocated in the heap
     535,544,056 bytes copied during GC
     117,603,408 bytes maximum residency (9 sample(s))
       1,647,828 bytes maximum slop
             265 MB total memory in use (2 MB lost due to fragmentation)

  Generation 0:  7527 collections,     0 parallel,  0.86s,  0.86s elapsed
  Generation 1:     9 collections,     0 parallel,  0.80s,  0.81s elapsed

  INIT  time    0.02s  (  0.00s elapsed)
  MUT   time    3.20s  (  3.63s elapsed)
  GC    time    1.66s  (  1.67s elapsed)
  EXIT  time    0.00s  (  0.00s elapsed)
  Total time    4.88s  (  5.30s elapsed)

  %GC time      34.0%  (31.6% elapsed)

  Alloc rate    1,227,386,315 bytes per MUT second

  Productivity  65.7% of total user, 60.5% of total elapsed

One more thing to note: with partial parsing there is no longer a difference
between mapM_ and mapMPar.

Best regards
Christopher Skrzętnicki
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