Tweet
Tweet

Slide 1

Slide 1 text

BUILDING FOR @andyhume SmashingConf, New York, 2014 PERFORMANCE RESILIENCE Tuesday, June 17, 14

Slide 2

Slide 2 text

WHY CARE? http://www.strangeloopnetworks.com/resources/infographics/web-performance-and-ecommerce/ Tuesday, June 17, 14

Slide 3

Slide 3 text

WHY CARE? http://www.strangeloopnetworks.com/resources/infographics/web-performance-and-ecommerce/ Tuesday, June 17, 14

Slide 4

Slide 4 text

WHY CARE? http://www.strangeloopnetworks.com/resources/infographics/web-performance-and-ecommerce/ Tuesday, June 17, 14

Slide 5

Slide 5 text

WHY CARE? http://www.strangeloopnetworks.com/resources/infographics/web-performance-and-ecommerce/ Tuesday, June 17, 14

Slide 6

Slide 6 text

WHY CARE? http://www.strangeloopnetworks.com/resources/infographics/web-performance-and-ecommerce/ Tuesday, June 17, 14

Slide 7

Slide 7 text

WHY CARE? http://www.strangeloopnetworks.com/resources/infographics/web-performance-and-ecommerce/ Tuesday, June 17, 14

Slide 8

Slide 8 text

Measure http://www.flickr.com/photos/kayaker1204/4319542459/ Tuesday, June 17, 14

Slide 9

Slide 9 text

Measure http://www.flickr.com/photos/kayaker1204/4319542459/ We have a median page load me of seven seconds, and our primary compe tor has a median page load me of three seconds. Tell a story Tuesday, June 17, 14

Slide 10

Slide 10 text

Measure http://www.flickr.com/photos/kayaker1204/4319542459/ Page load mes increased by 25% when we added feature x. Tell a story Tuesday, June 17, 14

Slide 11

Slide 11 text

Your bosses love a story http://www.flickr.com/photos/kayaker1204/4319542459/ Tuesday, June 17, 14

Slide 12

Slide 12 text

Spread the word http://www.flickr.com/photos/kayaker1204/4319542459/ Tuesday, June 17, 14

Slide 13

Slide 13 text

What numbers?! http://www.flickr.com/photos/kayaker1204/4319542459/ Tuesday, June 17, 14

Slide 14

Slide 14 text

What numbers?! http://www.flickr.com/photos/kayaker1204/4319542459/ Page load time? Total download size? Start render time? Time to first byte? Response time? Total HTTP requests? Document load time? Tuesday, June 17, 14

Slide 15

Slide 15 text

Tuesday, June 17, 14

Slide 16

Slide 16 text

Tuesday, June 17, 14

Slide 17

Slide 17 text

Tuesday, June 17, 14

Slide 18

Slide 18 text

Tuesday, June 17, 14

Slide 19

Slide 19 text

Tuesday, June 17, 14

Slide 20

Slide 20 text

Tuesday, June 17, 14

Slide 21

Slide 21 text

Tuesday, June 17, 14

Slide 22

Slide 22 text

Load Time First Byte Start Render Fully Loaded Speed Index FIRST VIEW 3.783s 0.128s 0.676s 6.530s 1522 REPEAT VIEW 2.268s 0.486s 0.486s 3.617s 980 Tuesday, June 17, 14

Slide 23

Slide 23 text

Load Time First Byte Start Render Fully Loaded Speed Index FIRST VIEW 3.783s 0.128s 0.676s 6.530s 1522 REPEAT VIEW 2.268s 0.486s 0.486s 3.617s 980 Tuesday, June 17, 14

Slide 24

Slide 24 text

Load Time First Byte Start Render Fully Loaded Speed Index FIRST VIEW 3.783s 0.128s 0.676s 6.530s 1522 REPEAT VIEW 2.268s 0.486s 0.486s 3.617s 980 Tuesday, June 17, 14

Slide 25

Slide 25 text

Measure and tracking trends http://www.flickr.com/photos/kayaker1204/4319542459/ Tuesday, June 17, 14

Slide 26

Slide 26 text

SpeedCurve http://speedcurve.com Tuesday, June 17, 14

Slide 27

Slide 27 text

SpeedCurve http://speedcurve.com Tuesday, June 17, 14

Slide 28

Slide 28 text

How to optimize http://www.flickr.com/photos/freefoto/2231356418/ Tuesday, June 17, 14

Slide 29

Slide 29 text

Web performance 101 http://www.flickr.com/photos/freefoto/2231356418/ Content-Encoding: gzip Cache-Control: max-age=315360000 Tuesday, June 17, 14

Slide 30

Slide 30 text

Optimizing: First byte http://www.flickr.com/photos/freefoto/2231356418/ Load Time First Byte Start Render Fully Loaded Speed Index FIRST VIEW 3.783s 0.128s 0.676s 6.530s 1522 REPEAT VIEW 2.268s 0.486s 0.486s 3.617s 980 Tuesday, June 17, 14

Slide 31

Slide 31 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp Tuesday, June 17, 14

Slide 32

Slide 32 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp Tuesday, June 17, 14

Slide 33

Slide 33 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp Tuesday, June 17, 14

Slide 34

Slide 34 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp Tuesday, June 17, 14

Slide 35

Slide 35 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp SSL Handshake Tuesday, June 17, 14

Slide 36

Slide 36 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp HTTP Redirect SSL Handshake Tuesday, June 17, 14

Slide 37

Slide 37 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp HTTP Redirect SSL Handshake Tuesday, June 17, 14

Slide 38

Slide 38 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp HTTP Redirect SSL Handshake Tuesday, June 17, 14

Slide 39

Slide 39 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp HTTP Redirect SSL Handshake Tuesday, June 17, 14

Slide 40

Slide 40 text

Optimizing: First byte DNS lookup TCP connect HTTP request Server time HTTP resp HTTP Redirect SSL Handshake Tuesday, June 17, 14

Slide 41

Slide 41 text

Eliminate redirects Just eleminate redirects Flush the document early? Prefetch DNS? But really, just eleminate redirects Optimizing: First byte Tuesday, June 17, 14

Slide 42

Slide 42 text

Optimizing: Start render http://www.flickr.com/photos/freefoto/2231356418/ Load Time First Byte Start Render Fully Loaded Speed Index FIRST VIEW 3.783s 0.128s 0.676s 6.530s 1522 REPEAT VIEW 2.268s 0.486s 0.486s 3.617s 980 Tuesday, June 17, 14

Slide 43

Slide 43 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 44

Slide 44 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 45

Slide 45 text

Remote JS Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 46

Slide 46 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 47

Slide 47 text

inline script waiting on remote CSS Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 48

Slide 48 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 49

Slide 49 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 50

Slide 50 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree fetching remote stylesheets Tuesday, June 17, 14

Slide 51

Slide 51 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 52

Slide 52 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 53

Slide 53 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 54

Slide 54 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree Tuesday, June 17, 14

Slide 55

Slide 55 text

Avoid blocking scripts Optimizing: Start render Tuesday, June 17, 14

Slide 56

Slide 56 text

Optimizing: Start render var script = document.createElement('script'); script.src = "app.js"; document.head.appendChild(script); Tuesday, June 17, 14

Slide 57

Slide 57 text

Optimizing: Start render var script = document.createElement('script'); script.src = "app.js"; document.head.appendChild(script); BREAKS THE PRE-PARSER! Tuesday, June 17, 14

Slide 58

Slide 58 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree HTML pre- parser Tuesday, June 17, 14

Slide 59

Slide 59 text

Remote JS Optimizing: Start render HTML parser DOM tree Layout Paint Render tree HTML pre- parser Tuesday, June 17, 14

Slide 60

Slide 60 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree HTML pre- parser Tuesday, June 17, 14

Slide 61

Slide 61 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree HTML pre- parser fetching remote stylesheets Tuesday, June 17, 14

Slide 62

Slide 62 text

Optimizing: Start render HTML parser DOM tree Layout Paint Render tree HTML pre- parser Tuesday, June 17, 14

Slide 63

Slide 63 text

Optimizing: Start render var script = document.createElement('script'); script.src = "app.js"; document.head.appendChild(script); BREAKS THE PRE-PARSER! Tuesday, June 17, 14

Slide 64

Slide 64 text

Optimizing: Start render Tuesday, June 17, 14

Slide 65

Slide 65 text

Avoid blocking scripts Optimizing: Start render Move script elements to end of Or... add async attribute to script elements Inline critical CSS Tuesday, June 17, 14

Slide 66

Slide 66 text

Avoid blocking scripts Optimizing: Start render Move script elements to end of Or... add async attribute to script elements Inline critical CSS https://github.com/pocketjoso/penthouse Tuesday, June 17, 14

Slide 67

Slide 67 text

Optimizing: Load time fully loaded http://www.flickr.com/photos/freefoto/2231356418/ Load Time First Byte Start Render Fully Loaded Speed Index FIRST VIEW 3.783s 0.128s 0.676s 6.530s 1522 REPEAT VIEW 2.268s 0.486s 0.486s 3.617s 980 Tuesday, June 17, 14

Slide 68

Slide 68 text

gzip compression (of course!) Far-future caching (of course!) Concatenate files (of course!) Optimizing: Load time fully loaded Tuesday, June 17, 14

Slide 69

Slide 69 text

Optimizing: Speed Index http://www.flickr.com/photos/freefoto/2231356418/ Load Time First Byte Start Render Fully Loaded Speed Index FIRST VIEW 3.783s 0.128s 0.676s 6.530s 1522 REPEAT VIEW 2.268s 0.486s 0.486s 3.617s 980 Tuesday, June 17, 14

Slide 70

Slide 70 text

http://www.flickr.com/photos/vpickering/6824364286/ Resilience Tuesday, June 17, 14

Slide 71

Slide 71 text

http://www.flickr.com/photos/the_jorr/325224175/ Unreliable Tuesday, June 17, 14

Slide 72

Slide 72 text

http://www.flickr.com/photos/8040811@N06/3167877765 Progressive enhancement th Tuesday, June 17, 14

Slide 73

Slide 73 text

The future http://www.flickr.com/photos/kayaker1204/4319542459/ Tuesday, June 17, 14

Slide 74

Slide 74 text

Future: HTTP/2 SPDY Tuesday, June 17, 14

Slide 75

Slide 75 text

Future: HTTP/2 SPDY Multiplexing Cache pushing Tuesday, June 17, 14

Slide 76

Slide 76 text

Future: ServiceWorker Tuesday, June 17, 14

Slide 77

Slide 77 text

Future: ServiceWorker this.addEventListener('fetch', function (e) { if (e.request.url.host === 'guardian.co.uk') { e.forwardTo('http://theguardian.com'); } } (Possibly not possible) Tuesday, June 17, 14

Slide 78

Slide 78 text

Future: ServiceWorker this.addEventListener('fetch', function (e) { if (window.innerWidth > 500) { e.forwardTo(e.request.url + '?width=large'); } } (Possibly not possible) Tuesday, June 17, 14

Slide 79

Slide 79 text

Experiment and measure http://www.flickr.com/photos/kayaker1204/4319542459/ Tuesday, June 17, 14

Slide 80

Slide 80 text

Experiment and measure http://www.flickr.com/photos/kayaker1204/4319542459/ Theorize Experiment, and... Measure Tuesday, June 17, 14

Slide 81

Slide 81 text

Thank-you! http://lanyrd.com/sdbmhb @andyhume Creative Commons Licensed Attribution, Non-Commercial, Share Alike cc Tuesday, June 17, 14