1. Profiling Go code
A beginners tutorial
Go Stockholm Meetup #7 “High Performance Go”
Dec 5th 2013
Samuel Lampa
@smllmp
+samuellampa
saml.rilspace.org
Developer at
www.uppmax.uu.se, www.farmbio.uu.se, rilpartner.se

2. Enable profiling: Standard way
Not terribly user friendly :/

3. … especially compared to python:

4. But, thanks to this Guy at Canonical
(Dave Cheney) ...
●
●
dave.cheney.net
twitter.com/davecheney

5. … we can now enable profiling
in a much easier way:

6. How to run it

7. How to run it

8. How to run it

9. Call graph as PDF, weighted by execution time

10. A few more options ...

11. Zoomable / Scrollable SVG in browser

12. A few performance tricks
for string processing...

13. Version 1

14. Version 2 – Table optimization

15. Version 3 – Using bufio Scanner(), new in Go 1.2

16. Version 4 – Using pointers for counters

17. Performance improvement, version 1-4

18. Creds goes to ...
●
●
Roger Peppe, also at Canonical, for
help with the optimizations, and the
final optimized version!
twitter.com/rogpeppe

19. Learn more
●
blog.golang.org/profiling-go-programs
●
tinyurl.com/go-pprof-win (Using pprof on Windows)
●
blog.cloudflare.com/recycling-memory-buffers-in-go
●
saml.rilspace.org/moar-languagez-gc-content-in-pytho
n-d-fpc-c-and-c
Also, don't miss
●
gplus.to/golangplus
●
golangweekly.com

20. Thank you!