On Wed, Jun 27, 2012 at 02:57:25PM +0200, Landry Breuil wrote: >> To build PyPy, you will need a fair bit of RAM (8Gb is definitely safe; >> 6Gb is probably safe). Once built, PyPy often consumes less memory than >> CPython. [...] > They use java to build or what ? What can be so greedy and insane that it > needs that much ram ?
It is a very unusual system. It reads in hundreds of thousands of lines of Python (well, RPython) code, performs static analysis on it, then spits out C; some of those files equally cause GCC to consume a few Gb of RAM. At the risk of a shamless plug, this article I wrote partly explains why PyPy and RPython are so interesting: http://tratt.net/laurie/tech_articles/articles/fast_enough_vms_in_fast_enough_time There are also some academic publications (see e.g. "Tracing the meta-level: PyPy's tracing JIT compiler" by Bolz et al.) that go into more detail. Laurie -- Personal http://tratt.net/laurie/ The Converge programming language http://convergepl.org/ https://github.com/ltratt http://twitter.com/laurencetratt
