[pypy-svn] r77404 - pypy/extradoc/planning
arigo at codespeak.net
arigo at codespeak.net
Mon Sep 27 13:43:54 CEST 2010
Author: arigo
Date: Mon Sep 27 13:43:53 2010
New Revision: 77404
Modified:
pypy/extradoc/planning/jit.txt
Log:
Add a comment.
Modified: pypy/extradoc/planning/jit.txt
==============================================================================
--- pypy/extradoc/planning/jit.txt (original)
+++ pypy/extradoc/planning/jit.txt Mon Sep 27 13:43:53 2010
@@ -92,6 +92,8 @@
- think out looking into functions or not, based on arguments,
for example contains__Tuple should be unrolled if tuple is of constant
length. HARD, blocked by the fact that we don't know constants soon enough
+ Also, an unrolled loop means several copies of the guards, which may
+ fail independently, leading to an exponential number of bridges
- out-of-line guards (when an external change would invalidate existing
pieces of assembler)
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