Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
C
cython
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Labels
Merge Requests
0
Merge Requests
0
Analytics
Analytics
Repository
Value Stream
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Commits
Open sidebar
nexedi
cython
Commits
e7839786
Commit
e7839786
authored
Nov 27, 2009
by
Robert Bradshaw
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
More typos (Kevin Stueve)
parent
cfdb3685
Changes
2
Hide whitespace changes
Inline
Side-by-side
Showing
2 changed files
with
8 additions
and
8 deletions
+8
-8
src/quickstart/cythonize.rst
src/quickstart/cythonize.rst
+1
-1
src/tutorial/profiling_tutorial.rst
src/tutorial/profiling_tutorial.rst
+7
-7
No files found.
src/quickstart/cythonize.rst
View file @
e7839786
...
@@ -108,7 +108,7 @@ Determining where to add types
...
@@ -108,7 +108,7 @@ Determining where to add types
------------------------------
------------------------------
Because static typing is often the key to large speed gains, beginners
Because static typing is often the key to large speed gains, beginners
often have a tendency to type everything in si
te
. This cuts down on both
often have a tendency to type everything in si
ght
. This cuts down on both
readability and flexibility. On the other hand, it is easy to kill
readability and flexibility. On the other hand, it is easy to kill
performance by forgetting to type a critical loop variable. Two essential
performance by forgetting to type a critical loop variable. Two essential
tools to help with this task are profiling and annotation.
tools to help with this task are profiling and annotation.
...
...
src/tutorial/profiling_tutorial.rst
View file @
e7839786
...
@@ -132,11 +132,11 @@ the code got slower by 2 seconds because it ran inside the cProfile module. The
...
@@ -132,11 +132,11 @@ the code got slower by 2 seconds because it ran inside the cProfile module. The
table contains the real valuable information. You might want to check the
table contains the real valuable information. You might want to check the
python `profiling documentation <http://docs.python.org/library/profile.html>`_
python `profiling documentation <http://docs.python.org/library/profile.html>`_
for the nitty gritty details. The most important columns here are totime (total
for the nitty gritty details. The most important columns here are totime (total
time spen
d
in this function **not** counting functions that were called by this
time spen
t
in this function **not** counting functions that were called by this
function) and cumtime (total time spen
d
in this function **also** counting the
function) and cumtime (total time spen
t
in this function **also** counting the
functions called by this function). Looking at the tottime column, we see that
functions called by this function). Looking at the tottime column, we see that
approximately half the time is spen
d in approx_pi and the other half is spend
approximately half the time is spen
t in approx_pi and the other half is spent
in recip_square. Also half a second is spen
d
in range ... of course we should
in recip_square. Also half a second is spen
t
in range ... of course we should
have used xrange for such a big iteration. And in fact, just changing range to
have used xrange for such a big iteration. And in fact, just changing range to
xrange makes the code run in 5.8 seconds.
xrange makes the code run in 5.8 seconds.
...
@@ -280,11 +280,11 @@ of our first Cython version. Also note that recip_square has vanished from the
...
@@ -280,11 +280,11 @@ of our first Cython version. Also note that recip_square has vanished from the
table like we wanted. But the most peculiar and import change is that
table like we wanted. But the most peculiar and import change is that
approx_pi also got much faster. This is a problem with all profiling: calling a
approx_pi also got much faster. This is a problem with all profiling: calling a
function in a profile run adds a certain overhead to the function call. This
function in a profile run adds a certain overhead to the function call. This
overhead is **not** added to the time spen
d
in the called function, but to the
overhead is **not** added to the time spen
t
in the called function, but to the
time spen
d
in the **calling** function. In this example, approx_pi didn't need 2.622
time spen
t
in the **calling** function. In this example, approx_pi didn't need 2.622
seconds in the last run; but it called recip_square 10000000 times, each time taking a
seconds in the last run; but it called recip_square 10000000 times, each time taking a
little to set up profiling for it. This adds up to the massive time loss of
little to set up profiling for it. This adds up to the massive time loss of
around 2.6 seconds. Having disable profiling for the often called function now
around 2.6 seconds. Having disable
d
profiling for the often called function now
reveals realistic timings for approx_pi; we could continue optimizing it now if
reveals realistic timings for approx_pi; we could continue optimizing it now if
needed.
needed.
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment