Wicked Fast WordPress - WordCamp Boston 2013

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i! GoMakeThings.com 5 @ChrisFerdinandi #! WICKED FAST WORDPRESS

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WHY DOES SPEED MATTER?

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20% decrease in search traffic from just a 500ms delay Source: www.slideshare.net/stubbornella/designing-fast-websites-presentation

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1% loss in sales from just a 100ms delay Source: www.slideshare.net/stubbornella/designing-fast-websites-presentation

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$6.1M based on 2012 sales

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600kb average webpage size in 2010 Source: www.webperformancetoday.com/2013/06/05/web-page-growth-2010-2013/

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1.2mb average webpage size in 2013 Source: www.webperformancetoday.com/2013/06/05/web-page-growth-2010-2013/

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2x in just three years Source: www.webperformancetoday.com/2013/06/05/web-page-growth-2010-2013/

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COMPUTERS GET FASTER EVERY YEAR. Everybody

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Source: www.lukew.com

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MOBILE IS THE WEB $!

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Source: www.google.com/think/research-studies/creating-moments-that-matter.html 77% of mobile searches happen at work or at home ^! =!

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Source: www.flickr.com/photos/cseeman/4020336221/

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55% AMERICANS WHO HAVE ACCESSED THE WEB via a mobile device in 2012 Source: blogs.hbr.org/cs/2013/05/the_rise_of_the_mobile-only_us.html

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31% AMERICANS WHO HAVE PRIMARILY ACCESSED THE WEB via a mobile device in 2012 Source: blogs.hbr.org/cs/2013/05/the_rise_of_the_mobile-only_us.html

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74% of mobile users will leave your site if it takes more than 5 seconds to load Source: bradfrostweb.com/blog/post/performance-as-design/

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4G LTE IS AS FAST AS BROADBAND WIFI. Everybody

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Source: www.flickr.com/photos/elviskennedy/8131276426/

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Source: www.flickr.com/photos/jonathankosread/8026724727/

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Source: www.flickr.com/photos/ericparker/2102020762/

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45% traffic from mobile devices Source: Google Analytics

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0 5,000 10,000 15,000 20,000 25,000 May 2011 May 2012 January 2013 August 2013 ~9% ~23% ~36% ~45%

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~70% 1

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THE PERFECT STORM Bigger sites Weaker devices Higher expectations

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WHAT CAN YOU DO ABOUT IT?

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) READS HTML * RENDERS CONTENT + DOWNLOADS FILES (2 at a time) CSS stops rendering JS stops downloads

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) READS HTML * RENDERS CONTENT + DOWNLOADS FILES (2 at a time) CSS stops rendering JS stops downloads

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) READS HTML * RENDERS CONTENT + DOWNLOADS FILES (2 at a time) CSS stops rendering JS stops downloads

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)! HTML ORDER MATTERS

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CSS AT THE TOP to avoid repaints JS AT THE BOTTOM* to maximize downloads * Exception: Modernizr (and similar scripts)

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WP_ENQUEUE_STYLE in the header by default

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WP_ENQUEUE_SCRIPT also in the header by default wp_enqueue_script( $handle, $src, $deps, $ver, $in_footer ); true

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) READS HTML * RENDERS CONTENT + DOWNLOADS FILES (2 at a time) CSS stops rendering JS stops downloads

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# FAST 300kb @ SLOW 100kb 100kb 100kb

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DNS LOOKUPS HTTP HEADERS REDIRECTS 404s Lots of places for things to go wrong ~!

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COMBINE LIKE FILES -! (concatenation)

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@ SLOW dropdowns.js fitvids.js modals.js # FAST scripts.js

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Browsers download all ﬁles regardless of screen size @ SLOW header.php

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# FAST .base-styles { … } @media (min-width: 20em) { … } @media (min-width: 40em) { … } @media (min-width: 60em) { … } header.php style.css

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file weight

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REMOVE WHITESPACE s! (minification)

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~40% reduction in file size

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STYLE.CSS (human-readable) STYLE.MIN.CSS (minified)

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REPLACE THIS get_bloginfo('stylesheet_url'); WITH THIS get_bloginfo('stylesheet_directory') . '/style.min.css';

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SCRIPTS.JS (human-readable) SCRIPTS.MIN.JS (minified)

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PLUGINS MAKE THIS HARD. They also make it easy.

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MINQUEUE http://wordpress.org/plugins/minqueue/

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~65% smaller GOOGLE-HOSTED JQUERY //ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js

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GOOGLE-HOSTED JQUERY http://cferdinandi.github.io/google-hosted-jquery/

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MINIFY YOUR HTML http://cferdinandi.github.io/html-minify/

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USE IMAGES WISELY r!

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ICON FONTS Lightweight A single file Styleable with CSS Scalable Compatible back to IE 5 Considerations 1 color per icon* Windows Phone 7 support sucks

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@font-face { … } .icon-twitter:before { font-family: icon-font; content: "\e001"; color: #0088cc; font-size: 4em; } 5!

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Source: icomoon.io

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Source: icomoon.io

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HOW TO USE ICON FONTS http://gomakethings.com/icon-fonts/

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IMAGE SPRITES (background-image instead of @font-face) 5! 0! 2! 3! 4! 1! 5! 0! 2! 3! 4! 1!

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# FAST 300kb @ SLOW 100kb 100kb 100kb

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IMAGE SPRITE GENERATOR http://spritegen.website-performance.org/

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SMARTER IMAGE FORMATS PNGs Logos Clean, simple images JPGs Photos Noisy images

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DIFFERENT JPG FORMATS Baseline Progressive

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BROWSER FOREGROUND BACKGROUND Chrome Firefox IE 8 IE 9 Safari Opera BROWSER “SUPPORT” Source: http://calendar.perfplanet.com/2012/progressive-jpegs-a-new-best-practice/

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COMPRESS JPGs 676kb 92kb

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87% reduction in file size

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70 High-quality JPG compression 90 WordPress default

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add_filter('jpeg_quality', function($arg){return 70;}); Source: www.wpbeginner.com/wp-tutorials/how-to-increase-or-decrease-wordpress-jpeg-image-compression/ not progressive and sometimes fuzzy

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COMPRESS & SHARPEN IMAGES https://github.com/cferdinandi/image-compress-and-sharpen

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REGENERATE THUMBNAILS http://wordpress.org/plugins/regenerate-thumbnails/

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Source: imageoptim.com/ SMUSH IMAGES

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USE ADAPTIVE IMAGES q!

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http://adaptive-images.com

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http://jetpack.me/support/photon/

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COMPRESS YOUR SITE a! (gzipping)

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~70% reduction in website size Source: developer.yahoo.com/performance/rules.html

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APACHE .HTACCESS FILE https://github.com/cferdinandi/htaccess

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# BEGIN WordPress RewriteEngine On RewriteBase /your-site/ RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /your-site/index.php [L] # END WordPress

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GZIPWTF http://gzipwtf.com/

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SET EXPIRE HEADERS c!

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# Your document html ExpiresByType text/html "access plus 0 seconds" # Media: images, video, audio ExpiresByType image/gif "access plus 1 month" ExpiresByType image/jpeg "access plus 1 month" ExpiresByType image/png "access plus 1 month" ExpiresByType video/mp4 "access plus 1 month" ExpiresByType video/ogg "access plus 1 month"

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APACHE .HTACCESS FILE https://github.com/cferdinandi/htaccess

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STYLE.MIN.10262013.CSS

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MINQUEUE does this automatically

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! & + & + & = ) ) READS HTML * RENDERS CONTENT + DOWNLOADS FILES (2 at a time) CSS stops rendering JS stops downloads

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PRE-BUILD YOUR SITE t!

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! & + & + & = ) ) READS HTML * RENDERS CONTENT + DOWNLOADS FILES (2 at a time) CSS stops rendering JS stops downloads

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Source: wordpress.org/plugins/quick-cache/

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COMMENT GARBAGE COLLECTOR http://wordpress.org/plugins/quick-cache-comment-garbagecollector/

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WEBSITE SPEED TEST http://tools.pingdom.com/fpt/

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1.  HTML order matters 2.  Combine like files 3.  Remove whitespace 4.  Use icon fonts (or sprites) 5.  Pick the right image format 6.  Compress & smush images 7.  Use adaptive images 8.  Compress your site 9.  Set Expires headers 10.  Prebuild your site #! WICKED FAST WORDPRESS

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GoMakeThings.com @ChrisFerdinandi [email protected] i! CHRIS FERDINANDI Kraken