Re: [Boost-users] [serialization] baffled by very long archive load time

Subject: Re: [Boost-users] [serialization] baffled by very long archive load time
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2010-03-29 11:41:19

AMDG

Martin Weinberg wrote:
> I have been developing and maintaining a large computatation
> statistics package (http://www.astro.umass.edu/BIE).  It is an MPI
> application that uses boost::sersialization to implement persistence.
>
> After recently adding a new class, I notice that the archive load
> times have gone from seconds to over an hour!!  The binary archive
> size is 30MB.  Regression tests suggest that the resumed state is
> correct albeit the very long load time.  The package is implemented in
> multiple shared libraries and classes are exported as suggested in the
> documentation.  I have noticed that I need to compile with "-Ox
> -fno-inline-small-functions" when x=2,3.  I'm not sure if this is
> significant.  The system is Debian/GNU Linux, 2.2Ghz 0pteron 64bit.
> The behavior is the same with Boost 1.37, 1.38 and 1.42.
>
> The new class has many nested STL container instances e.g.
>
>     vector< vector<float> > . . .
>
> but very few archived pointers.  I've not been able to isolate the
> cause in test cases (e.g. making very large instances of STL nested
> containers; these are deserialized in under a second).  Any thoughts
> on things to track down?
>   

Can you build with profiling  (-pg)?

In Christ,
Steven Watanabe