On Mon, 18 Jun 2012 15:28:24 +0100 Mark Shannon <m...@hotpy.org> wrote: > > But do they? The results of benchmarking would seem to suggest (at least > on my test machine) that overly-sparse dicts are slower. > Possibly due to increased cache misses.
Or, at least, they are not faster. See the synthetic experiments in http://bugs.python.org/issue10408 That said, Raymond might have witnessed different results at the time. Hardware evolves quickly and the parameters change (memory latency today is at least 50+ CPU cycles, which is quite a lot of wasted work on a pipelined superscalar CPU). Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
