This presentation is about a lecture I gave within the "Green Lab" course of the Computer Science master, Software Engineering and Green IT track of the Vrije Universiteit Amsterdam: http://masters.vu.nl/en/programmes/computer-science-software-engineering-green-it/index.aspx http://www.procaccianti.me

2. Vrije Universiteit Amsterdam
Efficient Database
queries:
-25%
Efficient
multi-threading:
-8%

3. Vrije Universiteit Amsterdam
Efficient Database Queries
[1] Procaccianti G., Fernandez H., Lago P. "Empirical Evaluation of Two Best-Practices for Energy-Efficient Software Development".
Accepted for publication in Journal of System and Software, 2016. Pre-print available on: http://dare.ubvu.vu.nl/handle/1871/54184

4. Vrije Universiteit Amsterdam
Efficient Database Queries
25% Energy savings
[1] Procaccianti G., Fernandez H., Lago P. "Empirical Evaluation of Two Best-Practices for Energy-Efficient Software Development".
Accepted for publication in Journal of System and Software, 2016. Pre-print available on: http://dare.ubvu.vu.nl/handle/1871/54184
3% Power savings

5. Vrije Universiteit Amsterdam
Efficient Database
queries:
-25%
Efficient
multi-threading:
-8%

6. Vrije Universiteit Amsterdam
Efficient Multithreading
[1] Procaccianti G., Fernandez H., Lago P. "Empirical Evaluation of Two Best-Practices for Energy-Efficient Software Development".
Accepted for publication in Journal of System and Software, 2016. Pre-print available on: http://dare.ubvu.vu.nl/handle/1871/54184

7. Vrije Universiteit Amsterdam
Efficient Multithreading
8.2% Power savings 8.4% Energy savings
[1] Procaccianti G., Fernandez H., Lago P. "Empirical Evaluation of Two Best-Practices for Energy-Efficient Software Development".
Accepted for publication in Journal of System and Software, 2016. Pre-print available on: http://dare.ubvu.vu.nl/handle/1871/54184

8. Vrije Universiteit Amsterdam
Efficient Database
queries:
-25%
Efficient
multi-threading:
-8%
Efficient ORM
strategies:
-60%

9. Vrije Universiteit Amsterdam
●

10. Vrije Universiteit Amsterdam
●

11. Vrije Universiteit Amsterdam
●

12. Vrije Universiteit Amsterdam

13. Vrije Universiteit Amsterdam
●
○
●
○
○
○ …

14. Vrije Universiteit Amsterdam
● LAMP stack (Linux, Apache, MySQL, PHP)
● Databases
● Virtual Machines
Case presentation by Wouter Diesveld on Thursday 15th

15. Vrije Universiteit Amsterdam
Efficient Database
queries:
-25%
Efficient
multi-threading:
-8%
Efficient Web pages:
-46%
Efficient ORM
strategies:
-60%

16. Vrije Universiteit Amsterdam
● Evaluate energy impact of Content Management Systems
○ E.g. Wordpress vs. Static web pages
● Experiment: compare 2 different VMs
○ different software stack
○ Same content

17. Vrije Universiteit Amsterdam

18. Vrije Universiteit Amsterdam
28% Power savings

19. Vrije Universiteit Amsterdam
46% Energy savings

20. Vrije Universiteit Amsterdam
46% Energy savings

21. Vrije Universiteit Amsterdam
●
○
●
○
○

22. Vrije Universiteit Amsterdam
● Wordpress, PHP
● Load Testing of Web Apps
● Virtual Machines
Case presentation by Patrick de Ridder on Thursday 15th

23. Vrije Universiteit Amsterdam
Progressive web apps in Android

24. Vrije Universiteit Amsterdam
Software built with web technologies that is accessible via a
mobile browser

25. Vrije Universiteit Amsterdam
Traditional mobile web apps:
● do not work offline
● no background activities
○ e.g., geofencing
● poor access to system APIs
○ push notifications, camera, contacts, etc.
● poor distribution (no app store)
● …

26. Vrije Universiteit Amsterdam
https://developer.mozilla.org/en-US/Apps/Progressive

27. Vrije Universiteit Amsterdam
https://developers.google.com/web/showcase/

28. Vrije Universiteit Amsterdam
PWAs have been advertised as:
● performance boosters
● network savers
● providers of better UX
● ….
What about their impact on energy consumption?

29. Vrije Universiteit Amsterdam
● Different levels of “PWA-ility”
● Network conditions
● Browser types/versions (it can
be even a desktop browser)
● Caching strategies
● Page load time
● CPU usage
● Memory consumption
● Number of network
requests
● Energy consumption
+ any other aspects you want to measure...

30. Vrije Universiteit Amsterdam
● HTML5, CSS3, and JavaScript
● Ajax-based communication for the web
● Android development environment
● Shell scripting
Introductory material available here:
https://developers.google.com/web/fundamentals

31. Vrije Universiteit Amsterdam

32. Vrije Universiteit Amsterdam
Procedure:
● Self-enroll on BlackBoard
● Fill this form: https://goo.gl/forms/b2nBcTpbS2ZOajOI2
Teams have to be finalized before next Thursday (Sept 8th)!

33. Vrije Universiteit Amsterdam
g.procaccianti@vu.nl
i.malavolta@vu.nl