| Topic: |
DEVELOP > c-Plus-Plus |
| User: |
"Renji Panicker" |
| Date: |
14 Dec 2007 10:03:26 PM |
| Object: |
Question about memory management. |
Hi everyone,
When developing a C++ application which requires creation/deletion of
small classes multiple times, can we rely on the memory management in
the standard libraries, or is it smarter to develop our own (perhaps
by overloading new/delete)?
I realize the answer to this question is compiler dependent (I am
using gcc 4.1.3 on Linux). However, can someone provide a general
answer, since the application I have in mind is expected to be cross
platform to work at the least with msvc and XCode as well.
Thanks!
-/renji
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| User: "Lance Diduck" |
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| Title: Re: Question about memory management. |
15 Dec 2007 10:22:30 AM |
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On Dec 14, 11:03 pm, Renji Panicker <renjipanic...@gmail.com> wrote:
Hi everyone,
When developing a C++ application which requires creation/deletion of
small classes multiple times, can we rely on the memory management in
the standard libraries, or is it smarter to develop our own (perhaps
by overloading new/delete)?
I realize the answer to this question is compiler dependent (I am
using gcc 4.1.3 on Linux). However, can someone provide a general
answer, since the application I have in mind is expected to be cross
platform to work at the least with msvc and XCode as well.
Thanks!
-/renj
After profiling does indeed find a bottleneck (and on your system the
worst is creating a small object in one thread and deleting it in
another) then yes create a small object allocator. new /delete
bottlenecks like this are fairly platform independent, other than the
tuning parameters (like pagesize and alignments). These are very easy
to build, and an example is found in Stroustrups C++TPL.
Lance
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| User: "Ian Collins" |
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| Title: Re: Question about memory management. |
14 Dec 2007 11:00:47 PM |
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Renji Panicker wrote:
Hi everyone,
When developing a C++ application which requires creation/deletion of
small classes multiple times, can we rely on the memory management in
the standard libraries, or is it smarter to develop our own (perhaps
by overloading new/delete)?
I realize the answer to this question is compiler dependent (I am
using gcc 4.1.3 on Linux). However, can someone provide a general
answer, since the application I have in mind is expected to be cross
platform to work at the least with msvc and XCode as well.
A custom allocator may help, but the only way to know for sure is to
measure. Object creation and deletion may not even be bottlenecks in
your system
--
Ian Collins.
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| User: "Renji Panicker" |
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| Title: Re: Question about memory management. |
14 Dec 2007 11:06:06 PM |
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Thanks for the quick response, Ian.
Regards,
-/renji
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