[Python-Dev] PEP for new dictionary implementation

[Antoine Pitrou]

On Wed, 08 Feb 2012 19:18:14 +0000
Mark Shannon <mark at hotpy.org> wrote:
> Proposed PEP for new dictionary implementation, PEP 410?
> is attached.
> 

So, I'm running a few benchmarks using Twisted's test suite
(see https://bitbucket.org/pitrou/t3k/wiki/Home).

At the end of `python -i bin/trial twisted.internet.test`:
-> vanilla 3.3: RSS = 94 MB
-> new dict:    RSS = 91 MB

At the end of `python -i bin/trial twisted.python.test`:
-> vanilla 3.3: RSS = 31.5 MB
-> new dict:    RSS = 30 MB

At the end of `python -i bin/trial twisted.conch.test`:
-> vanilla 3.3: RSS = 68 MB
-> new dict:    RSS = 42 MB (!)

At the end of `python -i bin/trial twisted.trial.test`:
-> vanilla 3.3: RSS = 32 MB
-> new dict:    RSS = 30 MB

At the end of `python -i bin/trial twisted.test`:
-> vanilla 3.3: RSS = 62 MB
-> new dict:    RSS = 78 MB (!)

Runtimes were mostly similar in these test runs.

Perspective broker benchmark (doc/core/benchmarks/tpclient.py and
doc/core/benchmarks/tpserver.py):
-> vanilla 3.3: 422 MB/sec
-> new dict:    402 MB/sec

Regards

Antoine.