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WHY SPEED
MATTERS
Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
A 100-millisecond delay in website
load time can hurt
conversion rates by 7%
— SOASTA State of online retail performance 2017
2 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
53% of mobile site visitors will
leave a page that takes longer
than 3 seconds to load
— Akamai/SOASTA Research
3 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
CONVERSION RATE IS INVERSELY
PROPORTIONAL TO LOAD TIME
4 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
BEWARENODDY MATHS AHEAD...
5 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
6 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
FIND YOUR
7 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
WHAT HAPPENS IF YOU DECREASE ?
11% increase in conversion rate
8 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
IS THIS ACCURATE?
CERTAINLY NOT RELIABLE, IT'S MORE TO
INDICATE A POINT.
9 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
10 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
IT'S NOT JUST
CONVERSIONS, THINK
ABOUT BOUNCES
11 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
12 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
WHAT IS SPEED?
13 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
WHAT IS SPEED?
1. Server
2. Network
3. Assets
4. Device
5. Scripts
14 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
IS IT JUST MOBILE?
15 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
16 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
"I HEAR MARKETING TAGS
ARE BAD. THEY'RE MY
PROBLEM. ARE THEY MY
PROBLEM?"
17 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
18 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
MEASURING THE IMPACT
ON YOUR PRODUCT
19 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
CASE STUDY - FINANCIAL TIMES
20 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
EVALUATE YOUR CURRENT
PERFORMANCE
21 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
WEBPAGETEST.ORG
22 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
23 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
24 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
SEE WHAT YOUR CUSTOMERS SEE
Webpagetest.org also takes
screenshots of the loading progress
which can be stitched together into a
video.
This can be used in combination with the
comparison features of the product to
give you a view of performance relative
to your competitors.
25 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That
Convert
GOOGLE'S LIGHTHOUSE REPORT
26 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
27 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
28 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
LOAD TESTING
29 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
30 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
CHROME UX REPORT
31 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
32 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
33 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
PAGESPEED INSIGHTS
34 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
35 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
MONITORING
36 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
37 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
TECHNICAL IMPROVEMENTS3
> Avoid landing page redirects
> Enable compression
> Improve server response time
> Leverage browser caching
> Minify resources
> Optimise images
> Optimise CSS delivery
> Prioritise visible content
> Remove render-blocking JavaScript
3
Based on the PageSpeed Insights Rules
38 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
FURTHER READING
SOASTA State of Online Retail Performance report –
essential reading for anyone wanting to understand how
performance affects online businesses.
Think with Google – Google has a wealth of resources for
businesses with several high profile pieces of research
into effects of web performance.
39 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
SEE MORE OF ME (AND MANY OTHER SPEAKERS)
40 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
THANKS!
I often say that when you can measure what you are speaking
about, and express it in numbers, you know something about
it; but when you cannot express it in numbers, your
knowledge is of a meagre and unsatisfactory kind; it may be
the beginning of knowledge, but you have scarcely, in your
thoughts, advanced to the stage of science, whatever the
matter may be.
— William Thomson 2
2
A simpler, more widely known version is "What gets measured gets managed" by Peter Drucker
41 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert

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Why Speed Matters

  • 1. WHY SPEED MATTERS Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 2. A 100-millisecond delay in website load time can hurt conversion rates by 7% — SOASTA State of online retail performance 2017 2 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 3. 53% of mobile site visitors will leave a page that takes longer than 3 seconds to load — Akamai/SOASTA Research 3 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 4. CONVERSION RATE IS INVERSELY PROPORTIONAL TO LOAD TIME 4 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 5. BEWARENODDY MATHS AHEAD... 5 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 6. 6 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 7. FIND YOUR 7 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 8. WHAT HAPPENS IF YOU DECREASE ? 11% increase in conversion rate 8 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 9. IS THIS ACCURATE? CERTAINLY NOT RELIABLE, IT'S MORE TO INDICATE A POINT. 9 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 10. 10 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 11. IT'S NOT JUST CONVERSIONS, THINK ABOUT BOUNCES 11 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 12. 12 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 13. WHAT IS SPEED? 13 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 14. WHAT IS SPEED? 1. Server 2. Network 3. Assets 4. Device 5. Scripts 14 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 15. IS IT JUST MOBILE? 15 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 16. 16 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 17. "I HEAR MARKETING TAGS ARE BAD. THEY'RE MY PROBLEM. ARE THEY MY PROBLEM?" 17 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 18. 18 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 19. MEASURING THE IMPACT ON YOUR PRODUCT 19 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 20. CASE STUDY - FINANCIAL TIMES 20 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 21. EVALUATE YOUR CURRENT PERFORMANCE 21 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 22. WEBPAGETEST.ORG 22 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 23. 23 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 24. 24 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 25. SEE WHAT YOUR CUSTOMERS SEE Webpagetest.org also takes screenshots of the loading progress which can be stitched together into a video. This can be used in combination with the comparison features of the product to give you a view of performance relative to your competitors. 25 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 26. GOOGLE'S LIGHTHOUSE REPORT 26 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 27. 27 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 28. 28 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 29. LOAD TESTING 29 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 30. 30 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 31. CHROME UX REPORT 31 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 32. 32 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 33. 33 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 34. PAGESPEED INSIGHTS 34 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 35. 35 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 36. MONITORING 36 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 37. 37 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 38. TECHNICAL IMPROVEMENTS3 > Avoid landing page redirects > Enable compression > Improve server response time > Leverage browser caching > Minify resources > Optimise images > Optimise CSS delivery > Prioritise visible content > Remove render-blocking JavaScript 3 Based on the PageSpeed Insights Rules 38 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 39. FURTHER READING SOASTA State of Online Retail Performance report – essential reading for anyone wanting to understand how performance affects online businesses. Think with Google – Google has a wealth of resources for businesses with several high profile pieces of research into effects of web performance. 39 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 40. SEE MORE OF ME (AND MANY OTHER SPEAKERS) 40 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert
  • 41. THANKS! I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of science, whatever the matter may be. — William Thomson 2 2 A simpler, more widely known version is "What gets measured gets managed" by Peter Drucker 41 — Why Speed Matters | ©Ian Thomas 2018 | @anatomic | Building Websites That Convert