Optimize All the Things WCOC 2019

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The document is a presentation on site performance optimization for developers. It discusses optimizing for business goals like revenue and user retention, as well as for human users and search engines. It provides an overview of tools for measuring site speed like Google PageSpeed and GTmetrix. It then covers techniques for optimization including using a content delivery network, full page caching, image optimization, asset optimization, frontend optimizations, database optimizations, server configurations, and scaling strategies. It also discusses balancing performance with reliability and avoiding premature optimization.

@mlteal | #WCOC | 2019
Optimize All
The Things!
A Developer’s Guide to Site Performance Optimization

@mlteal | #WCOC | 2019
Maura Teal (@mlteal)
Software Developer
at Pagely and NorthStack

@mlteal | #WCOC | 2019
What are we optimizing for?

@mlteal | #WCOC | 2019
What are we optimizing for?
Business
1. https://www.thinkwithgoogle.com/intl/en-154/insights-inspiration/research-data/need-mobile-speed-how-mobile-latency-impacts-publisher-revenue/
2. https://developers.google.com/web/fundamentals/performance/why-performance-matters/
• Increase revenue
• Retain users
• Stabilize hosting costs

@mlteal | #WCOC | 2019
What are we optimizing for?
Humans
1. https://developers.google.com/web/fundamentals/performance/why-performance-matters/
• Accessibility
• Location, speed, and data limitations
• Device limitations

@mlteal | #WCOC | 2019
What are we optimizing for?
Search
1. https://developers.google.com/web/fundamentals/performance/why-performance-matters/
2. https://moz.com/learn/seo/page-speed
• Search engines crawl sites
and assess performance
along the way

@mlteal | #WCOC | 2019
Where do we start?
• Google PageSpeed tools 
https://developers.google.com/speed/
• GTmetrix https://gtmetrix.com/
• WebPageTest https://www.webpagetest.org/
• Pingdom https://www.pingdom.com/
1. https://gtmetrix.com/blog/the-difference-between-gtmetrix-pagespeed-insights-pingdom-tools-and-webpagetest/

@mlteal | #WCOC | 2019
Site Speed vs. Page Speed
1. https://moz.com/learn/seo/page-speed
Where do we start?

@mlteal | #WCOC | 2019
Where do we start?

@mlteal | #WCOC | 2019
What version of PHP are you running?
1. http://php.net/supported-versions.php
2. https://make.wordpress.org/core/2015/09/10/wordpress-and-php7/
3. https://make.wordpress.org/core/2018/10/15/wordpress-and-php-7-3/

Distribute Everything!
@mlteal | #WCOC | 2019
Use a Content Delivery Network
• CloudFlare, Sucuri, Fastly, host-provided
• Alternatively: CloudFront, Akamai, Rackspace,
Google

Cache Everything!
@mlteal | #WCOC | 2019
Full page caching
• Many CDN’s provide this too (Full Site Acceleration)
• Managed WP Hosts
• WP plugins (W3 Total Cache, WP Rocket, etc)
• Challenging on ecommerce

Image Optimization
@mlteal | #WCOC | 2019

Asset Optimization
@mlteal | #WCOC | 2019
1. https://developers.google.com/web/fundamentals/performance/why-performance-matters/
2. https://www.doubleclickbygoogle.com/articles/mobile-speed-matters/
• Minify HTML, JS, and CSS
• Concatenate files when possible
• Limit frivolous scripts

@mlteal | #WCOC | 2019
Advanced Mode: Frontend
• Start with Chrome Dev Tools
• Network & performance
tabs provide great info

@mlteal | #WCOC | 2019
Advanced Mode: Databases

@mlteal | #WCOC | 2019
• Not all MYSQL queries are created equal
• Use indexes!
Advanced Mode: Databases

@mlteal | #WCOC | 2019
• Linux setups are considered standard
• Apache, NGINX, or combo for routing
• Location, location, location
Advanced Mode: Server

@mlteal | #WCOC | 2019
• New Relic https://newrelic.com/ 
paid, in-depth traces for PHP and SQL
• Datadog https://www.datadoghq.com/ 
paid, alternative to New Relic
• Grafana https://grafana.com 
open source, highly customizable server-level analytics
Advanced Mode: Tools 🔨⏰

@mlteal | #WCOC | 2019
• Assess the growth type to determine direction of
scale
• Horizontal with DB replication: many users
consuming, but not altering, content
• Vertical with only master DB to handle writes:
Many authors, constant updates that likely overlap
• Handle spikes in all cases
Advanced Mode: Scaling

Food for Thought
@mlteal | #WCOC | 2019
Performance vs Reliability

Food for Thought
@mlteal | #WCOC | 2019
Premature Optimization
• Utilizing certain code patterns affects
performance, but generally are minor
• Human readability and usability are more
important, think optimizing workflow and
improving things like testing processes

@mlteal | #WCOC | 2019
You’ve ﬁxed your code, and you’ve set
up your servers, what more can you do?
Cache more things!
Monitor performance
Improve 3rd party script usage

@mlteal | #WCOC | 2019
Maura Teal
@mlteal

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1. @mlteal | #WCOC | 2019 Optimize All The Things! A Developer’s Guide to Site Performance Optimization

2. @mlteal | #WCOC | 2019 Maura Teal (@mlteal) Software Developer at Pagely and NorthStack

3. @mlteal | #WCOC | 2019

4. @mlteal | #WCOC | 2019 What are we optimizing for?

5. @mlteal | #WCOC | 2019 What are we optimizing for? Business 1. https://www.thinkwithgoogle.com/intl/en-154/insights-inspiration/research-data/need-mobile-speed-how-mobile-latency-impacts-publisher-revenue/ 2. https://developers.google.com/web/fundamentals/performance/why-performance-matters/ • Increase revenue • Retain users • Stabilize hosting costs

6. @mlteal | #WCOC | 2019 What are we optimizing for? Humans 1. https://developers.google.com/web/fundamentals/performance/why-performance-matters/ • Accessibility • Location, speed, and data limitations • Device limitations

7. @mlteal | #WCOC | 2019 What are we optimizing for? Search 1. https://developers.google.com/web/fundamentals/performance/why-performance-matters/ 2. https://moz.com/learn/seo/page-speed • Search engines crawl sites and assess performance along the way

8. @mlteal | #WCOC | 2019 Where do we start? • Google PageSpeed tools  https://developers.google.com/speed/ • GTmetrix https://gtmetrix.com/ • WebPageTest https://www.webpagetest.org/ • Pingdom https://www.pingdom.com/ 1. https://gtmetrix.com/blog/the-difference-between-gtmetrix-pagespeed-insights-pingdom-tools-and-webpagetest/

9. @mlteal | #WCOC | 2019 Site Speed vs. Page Speed 1. https://moz.com/learn/seo/page-speed Where do we start?

10. @mlteal | #WCOC | 2019 Where do we start?

11. @mlteal | #WCOC | 2019 Where do we start?

12. @mlteal | #WCOC | 2019 What version of PHP are you running? 1. http://php.net/supported-versions.php 2. https://make.wordpress.org/core/2015/09/10/wordpress-and-php7/ 3. https://make.wordpress.org/core/2018/10/15/wordpress-and-php-7-3/

13. Distribute Everything! @mlteal | #WCOC | 2019 Use a Content Delivery Network • CloudFlare, Sucuri, Fastly, host-provided • Alternatively: CloudFront, Akamai, Rackspace, Google

14. Cache Everything! @mlteal | #WCOC | 2019 Full page caching • Many CDN’s provide this too (Full Site Acceleration) • Managed WP Hosts • WP plugins (W3 Total Cache, WP Rocket, etc) • Challenging on ecommerce

15. Image Optimization @mlteal | #WCOC | 2019

16. Asset Optimization @mlteal | #WCOC | 2019 1. https://developers.google.com/web/fundamentals/performance/why-performance-matters/ 2. https://www.doubleclickbygoogle.com/articles/mobile-speed-matters/ • Minify HTML, JS, and CSS • Concatenate files when possible • Limit frivolous scripts

17. @mlteal | #WCOC | 2019 Advanced Mode: Frontend • Start with Chrome Dev Tools • Network & performance tabs provide great info

18. @mlteal | #WCOC | 2019 Advanced Mode: Databases

19. @mlteal | #WCOC | 2019 • Not all MYSQL queries are created equal • Use indexes! Advanced Mode: Databases

20. @mlteal | #WCOC | 2019 • Linux setups are considered standard • Apache, NGINX, or combo for routing • Location, location, location Advanced Mode: Server

21. @mlteal | #WCOC | 2019 • New Relic https://newrelic.com/  paid, in-depth traces for PHP and SQL • Datadog https://www.datadoghq.com/  paid, alternative to New Relic • Grafana https://grafana.com  open source, highly customizable server-level analytics Advanced Mode: Tools 🔨⏰

22. @mlteal | #WCOC | 2019 • Assess the growth type to determine direction of scale • Horizontal with DB replication: many users consuming, but not altering, content • Vertical with only master DB to handle writes: Many authors, constant updates that likely overlap • Handle spikes in all cases Advanced Mode: Scaling

23. Food for Thought @mlteal | #WCOC | 2019 Performance vs Reliability

24. Food for Thought @mlteal | #WCOC | 2019 Premature Optimization • Utilizing certain code patterns affects performance, but generally are minor • Human readability and usability are more important, think optimizing workflow and improving things like testing processes

25. @mlteal | #WCOC | 2019 You’ve ﬁxed your code, and you’ve set up your servers, what more can you do? Cache more things! Monitor performance Improve 3rd party script usage

26. @mlteal | #WCOC | 2019 Questions?

27. @mlteal | #WCOC | 2019 Maura Teal @mlteal

Optimize All the Things WCOC 2019

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