37 Lessons I've Learned on the Performance Front Lines [WebPerfDays 2012]

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The document discusses lessons learned about web performance optimization over time based on the author's experience on the performance front lines. Some key findings include: mobile page load times are dominated by front-end performance; page size correlates strongly to mobile load times; and latency varies significantly for both desktop and mobile across locations and networks. Emerging trends also showed the average web page size growing to 1MB and most traffic shifting to mobile browsers.

Tecnología

37 Lessons I’ve Learned
on the Performance Front Lines
Joshua Bixby

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 4

This convergence of awareness,
even urgency, on the business side
and growing expertise in the tech
community around web performance
marks the beginning of a new industry
that I’m calling “WPO” – Web
Performance Optimization.

Steve Souders, May 2010

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 6

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 7

Way back in 2009...

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 8

Velocity 2010

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 9

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 10

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 11

Our earliest mobile findings

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 12

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 13

IE9 will not make pages faster by default

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 14

CDN doesn’t always = faster

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 15

Using Google Analytics as a proxy

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 16

Real-world mirrored proxy metrics

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 17

97% of mobile response time is at the front end

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 18

Big players are as guilty as the rest of us

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 19

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© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 21

1 out 4 top sites don’t use cache headers

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 22

3rd party scripts

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 23

“Mobile rage”
Not our
study,
but still
interesting

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 24

Latency over 3G varies hugely
Even when tested from the same location at the same time

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 25

35% of mobile visitors prefer the full site

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 26

Mobile: Full-site visitors spend more

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 27

Impact of delays on m-commerce metrics

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 28

Mobile: Impact of delay on bounce rate

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 29

Mobile: Impact of delays on return traffic

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 30

Average page views across browsers

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 31

Average time on site across browsers

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 32

Average bounce rate across browsers

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 33

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 34

Site speed and primary success?

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 35

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 36

Desktop latency ranges from 65-145ms

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 37

Mobile latency ranges from 90-190ms

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 38

Average web page is now 1 MB

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 39

Average web page is now 1 MB

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 40

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 41

Page size correlates to mobile load time

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 42

How does browser use vary through the day?

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 43

How does browser use vary over a week?

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 44

Finding the “performance poverty line”

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 45

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 46

Steve’s rules still apply

http://www.webperformancetoday.com/2012/05/29/browser-
innovation-14-web-performance-rules-faster-loading-websites/

http://www.webperformancetoday.com/2012/09/13/browser-
innovation-performance-rules-faster-loading-websites-2/

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 47

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 48

Ecommerce State of the Union (Fall 2012)

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 49

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© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 52

iPad 2 versus Galaxy Tablet

iPad 2 Galaxy Tablet

Platform iOS 5.1 Android 4.04

Browser Safari Android Browser

Processor 1 GHz Apple A5 1 GHz ARM

Display 9.5 inch 10.1-inch
512 MB DDR2 (1066 Mbit/s
Memory RAM) 1GB RAM

Cellular Radio 3G 3G
Class 12 (4+1/3+2/2+3/1+4
GPRS YES slots), 32 - 48 kbps

EDGE YES Class 12
HSDPA, 14.4 Mbps; HSDPA, 21 Mbps; HSUPA,
Speed HSUPA, 2 Mbps 5.76 Mbps

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 94

iPhone 4 versus Galaxy S

iPhone 4 Galaxy S

Platform iOS 4.1 Android 2.3.6

Browser Safari Android Browser

Processor 1GHz Apple A4 1GHz ARM

Display 3.5- inch 4-inch

Memory 512 MB eDRAM 512 MB RAM

Cellular Radio 3G 3G
Class 10 (4+1/3+2 slots), 32 - Class 12 (4+1/3+2/2+3/1+4
GPRS 48 kbps slots), 32 - 48 kbps

EDGE Class 10, 236.8 kbps Class 12
HSDPA, 7.2 Mbps; HSDPA, 7.2 Mbps; HSUPA,
Speed HSUPA, 5.76 Mbps 5.76 Mbps

iPhone 4 vs Galaxy S (3G)

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 96

iPhone 4 vs Galaxy S (3G)

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 97

3G compared to desktop

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 98

iPhone 5 versus Galaxy S3

iPhone 5 Galaxy S3

Platform iOS 6 Android 4.0.4

Browser Safari Android Browser

Processor 1.3GHz Apple A6 1.4 GHz quad-core ARM

Display 4-inch 4.8-inch

Memory 1G eDRAM 1GB RAM

Cellular Radio 3G/LTE 3G, 4G
Class 12 (4+1/3+2/2+3/1+4 slots),
GPRS YES 32 - 48 kbps

EDGE YES Class 12
DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps;
HSUPA, 5.76 Mbps, LTE, 100 Mbps; HSDPA, 21 Mbps; HSUPA,
Speed Rev. A, up to 3.1 Mbps 5.76 Mbps

iPhone 5 vs Galaxy S3 (LTE)

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 100

LTE compared to desktop

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 101

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 62

Source: http://fuzzyco.com/outliers/

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 4

© 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 64

© 2012 Strangeloop Networks
2011 Strangeloop. Faster Websites. Automatically.
Strangeloop. Faster Websites. Automatically. 103

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37 Lessons I've Learned on the Performance Front Lines [WebPerfDays 2012]

1. 37 Lessons I’ve Learned on the Performance Front Lines Joshua Bixby

6. This convergence of awareness, even urgency, on the business side and growing expertise in the tech community around web performance marks the beginning of a new industry that I’m calling “WPO” – Web Performance Optimization. Steve Souders, May 2010 © 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 6

47. Steve’s rules still apply http://www.webperformancetoday.com/2012/05/29/browser- innovation-14-web-performance-rules-faster-loading-websites/ http://www.webperformancetoday.com/2012/09/13/browser- innovation-performance-rules-faster-loading-websites-2/ © 2012 Strangeloop Networks Strangeloop. Faster Websites. Automatically. 47

53. iPad 2 versus Galaxy Tablet iPad 2 Galaxy Tablet Platform iOS 5.1 Android 4.04 Browser Safari Android Browser Processor 1 GHz Apple A5 1 GHz ARM Display 9.5 inch 10.1-inch 512 MB DDR2 (1066 Mbit/s Memory RAM) 1GB RAM Cellular Radio 3G 3G Class 12 (4+1/3+2/2+3/1+4 GPRS YES slots), 32 - 48 kbps EDGE YES Class 12 HSDPA, 14.4 Mbps; HSDPA, 21 Mbps; HSUPA, Speed HSUPA, 2 Mbps 5.76 Mbps

55. iPhone 4 versus Galaxy S iPhone 4 Galaxy S Platform iOS 4.1 Android 2.3.6 Browser Safari Android Browser Processor 1GHz Apple A4 1GHz ARM Display 3.5- inch 4-inch Memory 512 MB eDRAM 512 MB RAM Cellular Radio 3G 3G Class 10 (4+1/3+2 slots), 32 - Class 12 (4+1/3+2/2+3/1+4 GPRS 48 kbps slots), 32 - 48 kbps EDGE Class 10, 236.8 kbps Class 12 HSDPA, 7.2 Mbps; HSDPA, 7.2 Mbps; HSUPA, Speed HSUPA, 5.76 Mbps 5.76 Mbps

59. iPhone 5 versus Galaxy S3 iPhone 5 Galaxy S3 Platform iOS 6 Android 4.0.4 Browser Safari Android Browser Processor 1.3GHz Apple A6 1.4 GHz quad-core ARM Display 4-inch 4.8-inch Memory 1G eDRAM 1GB RAM Cellular Radio 3G/LTE 3G, 4G Class 12 (4+1/3+2/2+3/1+4 slots), GPRS YES 32 - 48 kbps EDGE YES Class 12 DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps, LTE, 100 Mbps; HSDPA, 21 Mbps; HSUPA, Speed Rev. A, up to 3.1 Mbps 5.76 Mbps

37 Lessons I've Learned on the Performance Front Lines [WebPerfDays 2012]

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