Levatas Engineer Manage Santiago Valdarrama explains why the internet is slowing down really fast, and no one seems to be doing anything about it.

1. We are flushing Internet’s
speed down the toilet
really fast!

2. @ Levatas
we are doing an amazing job

5. We are focusing on:
● User Interface
● User Experience
● Search Engine Optimization
● Accessibility
● Testability
● Code Quality

6. But who is focusing
on speed?

7. We are!

8. We are!
sort of

9. This is the question
we are asking today

10. This is the question
we are asking today
Is it too slow?

11. But that’s not enough

12. Amazon Study
1s delay could cost Amazon $1.6 billion
in sales each year

14. This is how our mind works
1-100ms
100-300ms
300-1000ms
1s+
10s+
Instant
Slight perceptible delay
Task focus, perceptible delay
Mental context switch
I’ll come back later

15. More pressure for mobile
56% of users
say that they expect the mobile web to be
faster than the desktop web.

16. Define our budget

17. Define our budget
100 ms - Great
1,000ms - Acceptable

18. With our budget, let’s make sure our
pages are fast(er).

19. With our budget, let’s make sure our
pages are fast(er).
right?

20. But we aren’t doing that

21. But we aren’t doing that
Actually, we are doing the opposite

25. We need to stop and
think

26. We need to stop and
think
and take action

27. Two things we can do:
1. Make our sites faster
1. Make our sites feel faster

28. To make our sites faster
1. Optimize images, CSS, HTML, JS
2. PNG vs JPG vs SVG
3. Minimize CSS, HTML, JS
4. Leverage browser cache
5. Gzip
6. Avoid unnecessary redirects
7. Leverage CDNs
8. Measure and Test

29. To make our sites feel faster
It’s all about user perception.
1. Avoid blank pages
2. Animations
3. Asynchronous operations

30. Conclusions
1. Speed can’t be an afterthought
2. It involves everyone: designers, devs, QAs
3. We can automate most of it

31. Fun fact
85% of mobile users are on 2G
Remember 2G?