Changes between Version 2 and Version 3 of Development/Profiling

Timestamp:

01/20/2013 01:10:25 PM (11 years ago)

Author:

bro

Comment:

Added section "cProfile and Run Snake Run revisited"

Development/Profiling

@@ +1 @@
+[[PageOutline(1-3,,inline)]]
+
 = Profiling =
 
@@ -156 +158 @@
 Also, line 418 (previously 417) uses 400ms instead of 10 seconds in the original code. Most importantly the line is now executed only 2162 times, and not 34592 times as it used to be. Including the the new if-test, the new code uses 560ms compared to 10 seconds in the old.
 The reason this is faster can be seen when comparing the time it takes to execute each of the lines one time. The if-test takes 4.4 microseconds on average, while setting the row value to True takes 189 microseconds.
+
+=== cProfile and Run Snake Run revisited ===
+
+Lets do a new profile with the changes to the code:
+{{{
+ python -m cProfile -o deluge.profile deluge -l deluge.log -L info
+}}}
+
+[[Image(Deluge_runsnake_after_optimizations.png)]]
+
+We can now see how update_view has dropped significantly on the list. Each call to update_view now takes 0.37 seconds on average compared to 1.18 in the original code.