[pypy-svn] r77881 - pypy/branch/32ptr-on-64bit/pypy/doc/config

arigo at codespeak.net arigo at codespeak.net
Wed Oct 13 16:43:38 CEST 2010

Author: arigo
Date: Wed Oct 13 16:43:37 2010
New Revision: 77881


Added: pypy/branch/32ptr-on-64bit/pypy/doc/config/translation.compressptr.txt
--- (empty file)
+++ pypy/branch/32ptr-on-64bit/pypy/doc/config/translation.compressptr.txt	Wed Oct 13 16:43:37 2010
@@ -0,0 +1,7 @@
+On 64-bit platforms, "compress" some pointers to 32 bits.
+Pointers to GC-managed, fixed-size objects are compressed.
+This saves potentially a lot of memory.  The drawback is that
+it will refuse to allocate more than 32GB of RAM for fixed-size
+objects.  (The program can use more RAM in total, e.g. with big
+strings, which are not fixed-size objects.)

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