Making WordPress fast(er)
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This document discusses the importance of website speed and provides tips to optimize performance. It notes that 53% of mobile site visits are abandoned after 3 seconds and shares examples of sites that saw major increases in conversions from reducing load times. To improve speed, it recommends strategies like caching, image optimization, lazy loading images, concatenating and minifying CSS and JS, output compression, browser caching, and using a content delivery network. The document aims to explain why performance matters and provide specific techniques to make sites faster.
Making WordPress fast(er)
- 3. Why does fast matter?
- 4. 53% of visits to mobile sites are abandoned after 3 seconds according to research from Google's DoubleClick. https://wpostats.com/2016/09/15/google-mobile-abandonment.html
- 5. https://wpostats.com/2015/10/29/mozilla-2point2.html Mozilla cut load time by 2.2 seconds and saw download conversions increase by 15.4%
- 6. Furniture retailer Zitmaxx Wonen reduced their typical load time to 3 seconds and saw conversion jump 50.2%. Overall revenue from the mobile site also increased by 98.7%. https://wpostats.com/2017/12/01/zitmaxx-wonen-load.html
- 7. http://httparchive.org/trends.php?s=All&minlabel=Mar+15+2011&maxlabel=Mar+15+2018 March 2011 0.8 MB March 2018 3.7 MB
- 8. http://www.nccgroup.com/en/blog/2013/06/will-faster-user-bandwidth-fix-your-site-performance-woes/ A bandwidth increase of 333% makes a page 12% faster. A 1330% increase gives a 32% improvement.
- 11. What is fast enough?
- 12. What is fast enough? Faster than the competition
- 13. Performance Budget For example: ● Page weight under 1 MB ● Total load time under 3 seconds ● Server response time under 0.5 seconds ● Speed Index under 2000 ● … http://timkadlec.com/2014/11/performance-budget-metrics/ http://cognition.happycog.com/article/designing-with-a-performance-budget https://www.youtube.com/watch?list=PLYo5nh8xQFpkwsu9QNlCpPGkmCCuTTWDJ&v=yqejmZrtmNg
- 29. Network (WiFi / Telecom Provider) Server (WordPress) Client (Browser)
- 30. PHP + MySQL (runs on the server) HTML, CSS, JavaScript, images, videos (send to the browser)
- 33. Full page caching Comet Cache https://wordpress.org/plugins/comet-cache/ Cachify https://wordpress.org/plugins/cachify/ WP Super Cache https://wordpress.org/plugins/wp-super-cache/ WP Rocket (Paid) https://wp-rocket.me/
- 34. Object Cache Batcache (Memcached) https://wordpress.org/plugins/batcache/ Cachify (Memcached) https://wordpress.org/plugins/cachify/ WP Redis (Redis) https://wordpress.org/plugins/wp-redis/
- 35. Network (WiFi / Telecom Provider)
- 37. Less is more
- 38. Images 6000x4000 (original) 11.1 MB 6000x4000 (optimised) 9.2 MB 1920x1280 1.3 MB 1024x683 0.4 MB
- 40. Desktop Image Optimisers ImageOptim (Mac) https://imageoptim.com/mac FileOptimizer (Windows) https://sourceforge.net/projects/nikkhokkho/ Trimage (Linux) https://trimage.org/
- 42. Image Cloud Services Optimus https://wordpress.org/plugins/optimus/ Kraken https://wordpress.org/plugins/kraken-image-optimizer/ TinyPNG https://wordpress.org/plugins/tiny-compress-images/ Imagify https://wordpress.org/plugins/imagify/
- 44. HTTP/1.1 Up to 6 parallel downloads HTTP/2 “Unlimited” parallel downloads
- 45. Lazy load images BJ Lazy Load https://wordpress.org/plugins/bj-lazy-load/ Crazy Lazy https://wordpress.org/plugins/crazy-lazy/
- 46. Contatenate + Minify CSS/JS Autoptimize https://wordpress.org/plugins/autoptimize/ WP Rocket (Paid) https://wp-rocket.me/
- 47. Compress text output in .htaccess <IfModule mod_deflate.c> AddOutputFilterByType DEFLATE text/plain AddOutputFilterByType DEFLATE text/javascript AddOutputFilterByType DEFLATE text/html AddOutputFilterByType DEFLATE text/xml AddOutputFilterByType DEFLATE text/css AddOutputFilterByType DEFLATE text/vtt AddOutputFilterByType DEFLATE text/x-component AddOutputFilterByType DEFLATE application/xml … https://gist.github.com/Zodiac1978/3145830
- 48. Re-use network connection in .htaccess <IfModule mod_headers.c> Header set Connection keep-alive </IfModule> https://gist.github.com/Zodiac1978/3145830
- 49. Client (Browser)
- 50. https://medium.com/dev-channel/the-cost-of-javascript-84009f51e99e On the high-end iPhone 8 it takes just ~4s to parse/compile CNN’s JS compared to ~13s for an average phone (Moto G4)
- 51. Set browser cache in .htaccess <IfModule mod_expires.c> ExpiresActive On ExpiresDefault "access plus 1 week" ExpiresByType text/html "access plus 1 minute" ExpiresByType application/json "access plus 0 seconds" ExpiresByType application/ld+json "access plus 0 seconds" ExpiresByType application/xml "access plus 0 seconds" ExpiresByType text/xml "access plus 0 seconds" ExpiresByType application/x-web-app-manifest+json "access plus 0 seconds" ExpiresByType text/cache-manifest "access plus 0 seconds" </IfModule> https://gist.github.com/Zodiac1978/3145830
- 52. No Etag when using expires in .htaccess <IfModule mod_expires.c> <IfModule mod_headers.c> Header unset ETag </IfModule> FileETag None </IfModule> https://gist.github.com/Zodiac1978/3145830
- 53. AMP (Google) Accelerated Mobile Pages https://wordpress.org/plugins/amp/ http://ampletter.org/ https://glueckpress.com/9336/amp-and-wordpress/