June 23, 2015
2:55 p.m.
On 23/06/15 15:14, Jonas Wielicki wrote:
To be fair, you will nevertheless get a slowdown when copy-on-write kicks in while first using whatever was cloned from the parent. This is nothing which blocks execution, but slows down execution.
Yes, particularly because of reference counts. Unfortunately Python stores refcounts within the PyObject struct. And when a refcount is updated a copy of the entire 4 KB page is triggered. There would be fare less of this if refcounts was kept in dedicated pages. Sturla