From: Tj Holowaychuk <tj@...>
Date: 2009-02-26T13:17:21+09:00
Subject: malloc error with String#<< / String#+

The repo is here if anyone wants to take a look
http://github.com/visionmedia/dm-forms/tree/master

This is the first time I have had a memory error of any kind, heres the
output message:

forms ruby(7152,0xa041efa0) malloc: *** mmap(size=1073741824) failed
(error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
ruby(7152,0xa041efa0) malloc: *** mmap(size=1073741824) failed (error
code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
./examples/../lib/dm-forms/base.rb:21:in `<<': failed to allocate memory
(NoMemoryError)
  from ./examples/../lib/dm-forms/base.rb:21:in `form'
  from ./examples/../lib/dm-forms/helpers.rb:19:in `form'
  from examples/benchmarks.rb:11
        ...


I did a ruby-prof test on that same file and got

%self     total     self     wait    child    calls  name
79.15      4.50     4.50     0.00     0.00      174  String#+
13.24      0.75     0.75     0.00     0.00       84  String#<<
 2.23      5.41     0.13     0.00     5.29       21
DataMapper::Form::Helpers#form


Looks REALLY odd to me ... when running more than 10-ish times it seems
to cause this memory error so something is really wrong that I have
done. Any suggestions? if you run 'rake benchmark' you will (probably)
see what i mean, I have tried without benchmarking as well this still
occurs so something stupid is going on.

Thanks in advance
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