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![How to use
# Assume that WSGI app is defined as "app"
server = make_server('127.0.0.1', 8000, app)
server.serve_forever()
# wsgi_lineprof
filters = [
FilenameFilter("main.py"),
TotalTimeSorter(),
]
app = LineProfilerMiddleware(app, filters=filters)](https://image.slidesharecdn.com/pyconjp2017lt-170908081527/85/Introducing-wsgi_lineprof-PyCon-JP-2017-LT-15-320.jpg)
Uploaded byYusuke Miyazaki
Introducing wsgi_lineprof / PyCon JP 2017 LT
The document introduces wsgi_lineprof, a new simple WSGI middleware created by Yusuke Miyazaki for line-by-line profiling of web applications. It highlights its compatibility with frameworks like Django and Flask, and emphasizes its ease of integration without requiring changes to existing application code. Additionally, the document encourages participation in the ISUCON speed-up contest using Python to improve web application performance.
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Introducing wsgi_lineprof / PyCon JP 2017 LT
- 1.
- 2. Yusuke Miyazaki @ymyzk •Master’s course student of Kyoto University • Programming languages / Type system • Member of CAMPHOR- in Kyoto • Community for student engineers and designers • Intern of a start-up in Tokyo (Working Remotely) • Uses Node.js (TypeScript & JavaScript) mainly • We’re hiring! Visit ymyzk.com for more details
- 3. Do you likebuilding web applications? 🙋🙋🙋
- 4. Do you likebuilding "fast" web applications? """
- 5.
- 6. ISUCON = IikanjiniSpeed Up Contest • Team: 2 or 3 people • Objective: Make the given web application faster • Modify configuration of OS or middleware • Add or replace middleware • Rewrite applications… • Rule: If a benchmark score (≈ number of requests) is high, then you win!!
- 7. ISUCON = IikanjiniSpeed Up Contest • I participated in ISUCON in 2015 and 2016… • But I lost in qualification rounds • It is not easy to speed up existing applications
- 8. How can wespeed up applications? 🤔🤔🤔
- 9. — Robert C. Pike"Notes on Programming in C" “Measure. Don't tune for speed until you've measured, and even then don't unless one part of the code overwhelms the rest.”
- 10. How can wefind bottlenecks? 🤔🤔🤔
- 11. Use Profilers • Python •profile / cProfile • timeit • line_profiler • memory_profiler • WSGI • Werkzurg • linesman They works well. But I want more simple one for webapp (especially for ISUCON)
- 12. I create anew profiler for web applications 💪💪💪
- 13.
- 14. wsgi_lineprof • WSGI middleware •Works well with WAFs: Django, Flask, Bottle… • Easy to integrate with existing applications without changing existing code of app. • Provides line-by-line profiling • Records every function call during a request • Records the followings for every lines: • Number of times the line was executed • Amount of time spent to execute the line
- 15. How to use #Assume that WSGI app is defined as "app" server = make_server('127.0.0.1', 8000, app) server.serve_forever() # wsgi_lineprof filters = [ FilenameFilter("main.py"), TotalTimeSorter(), ] app = LineProfilerMiddleware(app, filters=filters)
- 16.
- 17. Conclusion • wsgi_lineprof isa simple WSGI middleware for line- by-line profiling github.com/ymyzk/wsgi_lineprof • Proposals, feedback, and PRs are welcome! • Let’s participate in ISUCON using Python and win a victory! 🏆🏆🏆 Thank you for Listening!!