[pypy-commit] extradoc extradoc: Update to the current abstract

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: extradoc
Changeset: r5724:6c7cb7b0d8ce
Date: 2016-10-02 17:31 +0200
http://bitbucket.org/pypy/extradoc/changeset/6c7cb7b0d8ce/

Log:	Update to the current abstract

diff --git a/talk/pyconza2016/cffi-revdb.rst b/talk/pyconza2016/revdb.rst
rename from talk/pyconza2016/cffi-revdb.rst
rename to talk/pyconza2016/revdb.rst
--- a/talk/pyconza2016/cffi-revdb.rst
+++ b/talk/pyconza2016/revdb.rst
@@ -1,33 +1,24 @@
-
-CFFI, calling C // RevDB, a new debugger
+RevDB, a reverse debugger
 ========================================
 
 
 Abstract
 --------
 
-Two different topics:
+RevDB is an experimental "reverse debugger" for Python, similar to
+UndoDB-GDB or LL for C. You run your program once, in "record" mode,
+producing a log file; once you get buggy behavior, you start the
+reverse-debugger on the log file. It gives an (improved) pdb-like
+experience, but it is replaying your program exactly as it ran---all
+input/outputs are replayed from the log file instead of being redone.
 
-* CFFI: a simple way to call C code from your Python programs;
+The main point is that you can then go backward as well as forward in
+time: from a situation that looks really buggy you can go back and
+discover how it came to be. You also get "watchpoints", which are very
+useful to find when things change. Watchpoints work both forward and
+backward.
 
-* RevDB: an experimental "reverse debugger" for Python.
-
-The two topics have in common their existence thanks to PyPy, an
-alternative Python implementation in Python.  Both are interesting
-even if you are only using the regular CPython.
-
-*CFFI* is an alternative to using the standard CPython C API to extend
-Python (or other tools like Cython, SWIG or ctypes).  It was
-originally inspired by LuaJIT's FFI.  Like Cython, you declare C
-functions and compile that with a regular C compiler.  Unlike Cython,
-there is no special language: you manipulate C data structures and
-call C functions straight from Python.  I will show examples of how
-simple it is to call existing C code with CFFI.
-
-*RevDB* is a reverse debugger for Python, similar to UndoDB-GDB or LL
-for C.  You run your program once, in "record" mode; then you start
-the reverse-debugger on the log file.  It gives a pdb-like experience,
-but it is replaying your program exactly as it ran---and moreover you
-can now go backward as well as forward in time.  You also get
-"watchpoints", which are very useful to find when things change.  I
-will show how it works on small examples.
+I will show on small examples how you can use it, and also give an idea
+about how it works. It is based on PyPy, not CPython, so you need to
+ensure your program works on PyPy in the first place (but chances are
+that it does).