Author: Christian Tismer <[email protected]>
Branch: extradoc
Changeset: r4267:c7058d020706
Date: 2012-07-03 15:59 +0200
http://bitbucket.org/pypy/extradoc/changeset/c7058d020706/
Log: moving forward
diff --git a/talk/ep2012/stackless/slp-talk.pdf
b/talk/ep2012/stackless/slp-talk.pdf
index
2c75c65e61f2fd5e4a1ffa2986844c62209040f4..52ab702a7f775789f3adc37521d9eb6c3df36f31
GIT binary patch
[cut]
diff --git a/talk/ep2012/stackless/slp-talk.rst
b/talk/ep2012/stackless/slp-talk.rst
--- a/talk/ep2012/stackless/slp-talk.rst
+++ b/talk/ep2012/stackless/slp-talk.rst
@@ -4,6 +4,34 @@
The Story of Stackless Python
============================================
+What is Stackless?
+-------------------
+
+* *Stackless is a Python version that does not use the C stack*
+
+|pause|
+
+ - really? naah
+
+|pause|
+
+* Stackless is a Python version that does not keep state on the C stack
+
+ - the stack *is* used but
+
+ - cleared between function calls
+
+|pause|
+
+* Remark:
+
+ - theoretically. In practice...
+
+ - ... it is reasonable 80 % of the time
+
+ - we come back to this!
+
+
What is Stackless about?
-------------------------
@@ -15,7 +43,7 @@
|pause|
-* adds a single module
+* adds a single builtin module
|pause|
@@ -34,7 +62,7 @@
* is like an extension
- but, sadly, not really
-
+ - stackless **must** be builtin
- **but:** there is a solution...
@@ -65,6 +93,7 @@
- this will apply to tasklets as well
+
Cooperative Multitasking ...
-------------------------------
@@ -101,8 +130,8 @@
|end_scriptsize|
-Cooperative Multitasking ...
--------------------------------
+... Cooperative Multitasking ...
+---------------------------------
|scriptsize|
|example<| |>|
@@ -157,16 +186,17 @@
* greenlets are a subset of stackless
- - there is no scheduler
+ - can partially emulate stackless
- - can emulate stackless
+ - there is no builtin scheduler
+
+ - technology quite close to Stackless 2.0
|pause|
-* greenlets are about 5-10x slower to switch
-
+* greenlets are about 10x slower to switch context because
using only hard-switching
-
+
|pause|
* but the main difference is ...
@@ -226,6 +256,23 @@
|end_scriptsize|
+Greenlet vs. Stackless
+-----------------------
+
+* Greenlet is a pure extension module
+
+ - performance is good enough
+
+* Stackless can pickle program state
+
+ - stays a replacement of Python
+
+* Greenlet never can, as an extension
+
+* **easy installation** lets people select greenlet over stackless
+
+ - see the *eventlet*
+
Software archeology
-------------------
@@ -259,11 +306,19 @@
* these 80 % can be *pickled*
+
+Status of Stackless Python
+---------------------------
+
+* mature
+
+* Python 2 and Python 3
+
Thank you
---------
-* http://pypy.org/
+* http://www.stackless.com/
-* You can hire Antonio
+* You can hire me as a consultant
* Questions?
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