The document discusses several common myths about WordPress performance and security. It notes that while some plugins can slow a site down, others speed it up or have no effect. Inactive plugins and themes still need updates for security. Revisions and trash do not significantly impact performance. WordPress scales well for large sites. It is used by major companies and organizations, not just blogs or amateurs. WordPress security has improved, but proper precautions like updating plugins are still needed. Function calls are cached so removing them prevents functionality.

1. WordPress Myths
Some of the common misconceptions about WordPress

2. Speed

3. Speed
• Too many plugins slow your site

4. Speed
• Too many plugins slow your site
• Inactive plugins slow your site

5. Speed
• Too many plugins slow your site
• Inactive plugins slow your site
• Inactive themes slow your site

6. Speed
• Too many plugins slow your site
• Inactive plugins slow your site
• Inactive themes slow your site
• Revisions slow your site

7. Too many plugins

8. Too many plugins
• Some plugins are slow

9. Too many plugins
• Some plugins are slow
• Some plugins are fast

10. Too many plugins
• Some plugins are slow
• Some plugins are fast
• Some plugins have no effect

11. Too many plugins
• Some plugins are slow
• Some plugins are fast
• Some plugins have no effect
• Some plugins speed up your site

12. Too Many Plugins?

13. Too Many Plugins?
It depends.

14. Inactive Plugins

15. Inactive Plugins
• Myth: Inactive plugins have no effect on
your site speed

16. Inactive Plugins
• Myth: Inactive plugins have no effect on
your site speed
• You still need to keep them up to date for
security

17. Inactive Themes

18. Inactive Themes
• Myth: Inactive themes have no effect on
your site speed

19. Inactive Themes
• Myth: Inactive themes have no effect on
your site speed
• You still need to keep them up to date for
security

20. Too Many Revisions

21. Too Many Revisions
• WordPress is clever enough to ignore
revisions on the front end

22. Too Many Revisions
• WordPress is clever enough to ignore
revisions on the front end
• MySQL is clever enough that a lot of
revisions make no difference to query
speed

23. Too Many Revisions
• WordPress is clever enough to ignore
revisions on the front end
• MySQL is clever enough that a lot of
revisions make no difference to query
speed
• Myth: Revisions have no effect on your site
speed

24. Emptying The Trash

25. Emptying The Trash
• Too much trash slows down your site

26. Emptying The Trash
• Too much trash slows down your site
• Myth:As per revisions

27. Emptying The Trash
• Too much trash slows down your site
• Myth:As per revisions
• Setting define('EMPTY_TRASH_DAYS', 10 );
will delete all your trash posts after 10 days.

28. Emptying The Trash
• Too much trash slows down your site
• Myth:As per revisions
• Setting define('EMPTY_TRASH_DAYS', 10 );
will delete all your trash posts after 10 days.
• Myth: It will delete 10 day old trash every day.

29. WordPress Doesn’t Scale

30. WordPress Doesn’t Scale
• WordPress.com - 35,000,000 sites!
http://wordpress.com/stats/
2.5 Billion page views per month

31. WordPress Doesn’t Scale
• WordPress.com - 35,000,000 sites!
http://wordpress.com/stats/
2.5 Billion page views per month
• Edublogs.com - 500,000 blogs
8,000,000 page views per month
http://z1.tl/10c

32. WordPress Doesn’t Scale
• WordPress.com - 35,000,000 sites!
http://wordpress.com/stats/
2.5 Billion page views per month
• Edublogs.com - 500,000 blogs
8,000,000 page views per month
http://z1.tl/10c
• Myth: WordPress scales massively

33. Only for Blogs

34. Only for Blogs
• Also: It’s only for amateurs and hobbyists

35. Only for Blogs
• Also: It’s only for amateurs and hobbyists
• Wall St Journal

36. Only for Blogs
• Also: It’s only for amateurs and hobbyists
• Wall St Journal
• CNN

37. Only for Blogs
• Also: It’s only for amateurs and hobbyists
• Wall St Journal
• CNN
• Number 10 Downing Street

38. Only for Blogs
• Also: It’s only for amateurs and hobbyists
• Wall St Journal
• CNN
• Number 10 Downing Street
• Dept of Health

39. Only for Blogs
• Also: It’s only for amateurs and hobbyists
• Wall St Journal
• CNN
• Number 10 Downing Street
• Dept of Health
• Ford Motor Company

40. Only for Blogs
• Also: It’s only for amateurs and hobbyists
• Wall St Journal
• CNN
• Number 10 Downing Street
• Dept of Health
• Ford Motor Company
• Myth: It’s not just blogs, and it’s not just for
amateurs

41. WordPress is Insecure

42. WordPress is Insecure
• Myth: WordPress hasn’t has a major security
problems for at least a couple of years

43. WordPress is Insecure
• Myth: WordPress hasn’t has a major security
problems for at least a couple of years
• Automattic employ more than one security
specialist.

44. WordPress is Insecure
• Myth: WordPress hasn’t has a major security
problems for at least a couple of years
• Automattic employ more than one security
specialist.
• But you do need to take the proper
precautions

45. WordPress is Insecure
• Myth: WordPress hasn’t has a major security
problems for at least a couple of years
• Automattic employ more than one security
specialist.
• But you do need to take the proper
precautions
• Plugins and themes can be insecure

46. WordPress is Insecure
• Myth: WordPress hasn’t has a major security
problems for at least a couple of years
• Automattic employ more than one security
specialist.
• But you do need to take the proper
precautions
• Plugins and themes can be insecure
• Sometimes the hosting company is the problem

47. Function Calls

48. Function Calls
• Removing functions calls like
blog_info(‘blah’) saves a database call

49. Function Calls
• Removing functions calls like
blog_info(‘blah’) saves a database call
• Myth: Those options are cached.

50. Function Calls
• Removing functions calls like
blog_info(‘blah’) saves a database call
• Myth: Those options are cached.
• Removing them prevents plugins doing
clever things.

51. Questions
Other myths?