Link
Embed
Share
Beginning
This slide
Copy link URL
Copy link URL
Copy iframe embed code
Copy iframe embed code
Copy javascript embed code
Copy javascript embed code
Share
Tweet
Share
Tweet
Slide 1
Slide 1 text
Performance ...For dummies?
Slide 2
Slide 2 text
*
Slide 3
Slide 3 text
Why Performance?
Slide 4
Slide 4 text
(2012) Speed
Slide 5
Slide 5 text
3G = 7.2Mb MAx!! Are you mobile?
Slide 6
Slide 6 text
4G = 8-12Mb Not consistently Are you mobile?
Slide 7
Slide 7 text
74% of mobile web users will leave a site if it takes longer than 5 seconds to load. - Brad Frost Are you mobile?
Slide 8
Slide 8 text
What happened?
Slide 9
Slide 9 text
The Catalysts!
Slide 10
Slide 10 text
And this!
Slide 11
Slide 11 text
testing performance
Slide 12
Slide 12 text
Google Page Speed
Slide 13
Slide 13 text
Google Page Speed
Slide 14
Slide 14 text
Dev tools
Slide 15
Slide 15 text
Dev tools
Slide 16
Slide 16 text
Dev tools
Slide 17
Slide 17 text
Dev tools
Slide 18
Slide 18 text
Dev tools
Slide 19
Slide 19 text
Browsers
Slide 20
Slide 20 text
Render process
Slide 21
Slide 21 text
Parse Render process
Slide 22
Slide 22 text
Render process
Slide 23
Slide 23 text
“document.write()” that nasty bastard! - Patrick Hamann Are you mobile?
Slide 24
Slide 24 text
layout Render process
Slide 25
Slide 25 text
Render process
Slide 26
Slide 26 text
Paint Render process
Slide 27
Slide 27 text
Render process
Slide 28
Slide 28 text
https://vimeo.com/69385032 Jake archibald
Slide 29
Slide 29 text
Performance-y stuff
Slide 30
Slide 30 text
HTTP Requests CSS & JS Image compression HTTP Compression Browser Caching Be aware of your assets Performance
Slide 31
Slide 31 text
Http requests
Slide 32
Slide 32 text
http requests
Slide 33
Slide 33 text
Make fewer requests... http requests
Slide 34
Slide 34 text
MAXIMISE Parallelisation http requests
Slide 35
Slide 35 text
Keep alive connection http requests
Slide 36
Slide 36 text
Prefetching http requests
Slide 37
Slide 37 text
Resource prefetching http requests
Slide 38
Slide 38 text
Keep CSS on the same domain http requests
Slide 39
Slide 39 text
CSS & JS
Slide 40
Slide 40 text
CSS at the top... JS at the bottom! CSS & JS
Slide 41
Slide 41 text
Harry’s rules... (@csswizardry) CSS & JS
Slide 42
Slide 42 text
The controversial bit... CSS & JS
Slide 43
Slide 43 text
CSS and the critical path... CSS & JS
Slide 44
Slide 44 text
Inline your critical CSS CSS & JS
Slide 45
Slide 45 text
CSS & JS
Slide 46
Slide 46 text
CSS & JS
Slide 47
Slide 47 text
Optimise images
Slide 48
Slide 48 text
ImageOptim & JPEGmini Optimising images
Slide 49
Slide 49 text
Spriting Optimising images
Slide 50
Slide 50 text
HTTP Compression
Slide 51
Slide 51 text
HTML5 Boilerplate compression
Slide 52
Slide 52 text
Browser caching
Slide 53
Slide 53 text
The fastest HTTP request is the one not made - Someone? browser caching
Slide 54
Slide 54 text
HTML5 Boilerplate browser caching
Slide 55
Slide 55 text
be aware of your assets
Slide 56
Slide 56 text
assets
Slide 57
Slide 57 text
last points...
Slide 58
Slide 58 text
Tools!!
Slide 59
Slide 59 text
tools tools
Slide 60
Slide 60 text
https://developers.google.com/events/io/sessions/325206725 tools
Slide 61
Slide 61 text
grunt tools
Slide 62
Slide 62 text
Concatenation Compression Image Optimisation and more... tools
Slide 63
Slide 63 text
Compass tools
Slide 64
Slide 64 text
Final points...
Slide 65
Slide 65 text
Performance should be taken into account from day one! bored now?
Slide 66
Slide 66 text
Get developers involved early in the process bored now?
Slide 67
Slide 67 text
That’s all folks!