produce memory overhead in bazaar

[Martin Pool]

On 26 November 2010 21:44, Lukas Diekmann
<Lukas.Diekmann at uni-duesseldorf.de> wrote:
> Hi there,
>
> my name is Lukas and i am working on optimizations for pypy. Pypy is a
> python interpreter written in python itself and aims to simplify,
> improve and speed-up python interpretation. For my master's thesis I am
> writing several benchmarks based on real programs that use a lot of
> memory. Thus I'm hoping to find out which datatypes produce the most
> overhead so I can extend the pypy interpreter and jit by implementing
> additional datatypes that are optimized for their purpose (for example a
> list containing integers only).
>
> I think that your program could be a candidate for benchmarking because
> it seems to eat a lot of memory. But since I am new to bazaar it is hard
> for me to tell and produce a situation where it uses the most memory. So
> I wanted to ask you, if you could tell me a scenario that is worth
> looking at and how I can reproduce it.
>
> If you want to know more about this project have a look at
> http://morepypy.blogspot.com/2010/08/call-for-benchmarks.html
> <http://morepypy.blogspot.com/2010/08/call-for-benchmarks.html>

Hi, Lukas, that sounds like a pretty good project, both for Pypy and Bazaar.

The short answer is that fetching a large repository like lp:emacs or
lp:launchpad and then running 'bzr pack' or committing a lot of
changes is a decent test.

John Arbash Meinel and others have been doing some memory optimization
work and you can find some descriptions by looking back through the
list archives.

Another option is to look for bugs tagged 'memory'.

And finally the bzr usertest plugin has some macrobenchmarks.

Stay in touch,
-- 
Martin