#100DaysOfCode in Python Transcripts
Chapter: Days 49-51: Measuring performance
Lecture: Your turn: Day 3
Login or
purchase this course
to watch this video and the rest of the course contents.
0:00
Third day, it's time to improve
0:02
the performance of your application.
0:03
You've chosen it.
0:04
You've gone through and found out where it's slow.
0:06
So what you're going to do is focus one by one
0:08
on the five slow functions and try to make it faster.
0:12
Look at it, try to understand where it's slow,
0:14
and if you can change something
0:16
about the way that it works, right,
0:18
in our example we said, well,
0:19
we're parsing the CSV and we're actually converting
0:21
12 columns of data and actually we're only using four.
0:24
Let's just throw away the other eight columns
0:26
because we're never using them,
0:28
and that conversion is entirely wasteful.
0:31
We'll look for things like that.
0:32
Go through each one of the five functions,
0:34
change 'em one at a time,
0:36
rerun the profiler compared against
0:38
your times from the previous day,
0:40
and if it gets better, keep that change.
0:43
If it actually gets slower, forget it.
0:44
Just leave it alone or try something different.
0:46
All right, that's it.
0:47
So now you should have an app that's faster.
0:49
Hopefully, much faster than it was before
0:52
and you now have this new skill
0:54
with profiling to understand
0:55
the performance of Python applications.
