Dealing with PHP performance at scale

1. Sherif Ramadan
PHP Performance
At
Scale

2. What is performance?
A factor of efficiently producing output.
Finite resources must serve infinite needs.

3. What is scale?
A quantitative measure of need.
Dealing with sheer numbers of inputs and outputs.

4. First, let’s clear up some
preconceived notions
about PHP…

5. Why does PHP have a
bad wrap?

6. “PHP can run really bad
code really well” -
Rasmus Lerdorf
“1” + 1 == 2

7. function argument order…!
!
array_map(<callback>, <array>)
array_filter(<array>, <callback>)

8. type juggling behavior!
!
md5('240610708') == md5('QNKCDZO')
“0e462097431906509019562988736854"
"0e830400451993494058024219903391"

9. Bueller? Bueller? Anyone?
Popularity has its price…

10. We’re going back to
1995!

11. The First PHP
Announcing the Personal Home Page Tools (PHP Tools) version 1.0.
These tools are a set of small tight cgi binaries written in C.
They perform a number of functions including:
. Logging accesses to your pages in your own private log files
. Real-time viewing of log information
. Providing a nice interface to this log information
. Displaying last access information right on your pages
. Full daily and total access counters
. Banning access to users based on their domain
. Password protecting pages based on users' domains
. Tracking accesses ** based on users' e-mail addresses **
. Tracking referring URL's - HTTP_REFERER support
. Performing server-side includes without needing server support for it
. Ability to not log accesses from certain domains (ie. your own)
. Easily create and display forms
. Ability to use form information in following documents
Here is what you don't need to use these tools:
. You do not need root access - install in your ~/public_html dir
. You do not need server-side includes enabled in your server
. You do not need access to Perl or Tcl or any other script interpreter
. You do not need access to the httpd log files
The only requirement for these tools to work is that you have
the ability to execute your own cgi programs. Ask your system
administrator if you are not sure what this means.
The tools also allow you to implement a guestbook or any other
form that needs to write information and display it to users
later in about 2 minutes.
The tools are in the public domain distributed under the GNU
Public License. Yes, that means they are free!
For a complete demonstration of these tools, point your browser
at: http://www.io.org/~rasmus
--
Rasmus Lerdorf
ras...@io.org
http://www.io.org/~ras

12. Why do we care about
performance?

13. We Live In An
Information Age

14. More people;
more data;
more time online!

15. Lots of Data!!!
Cisco predicts annual data transfer of a zettabyte by 2016!

16. Impactful change is fundamentally disruptive…

17. SELECT * FROM table LIMIT 10;
!
Thank PHP!

18. How do I improve performance?

19. It depends…

20. What matters to you?

21. Factors of Performance
• Economics
• Luxury
• Speed

22. Economy?
• Goes 0 - 60 (MPH) > 10 Seconds
• Does ~50 MPG
• Costs ~$24K

23. Luxury?
• Goes 0 - 60 (MPH) < 4 Seconds
• Does ~14 MPG
• Costs ~$200K

24. Speed?
• Goes 0 - 60 (MPH) < 2 Seconds
• Does 3.1 MPG
• Costs ~$2.6 Million

25. All of The Above?
• Goes 0 - 60 (MPH) < 6 Seconds
• Uses ~85KwH (320 Servers)
• Costs ~$79K

26. Architecture

27. –Rasmus Lerdorf
“Scaling something up is hard. Scaling
something down is even harder. Both are rocket
science.”

28. PHP Scale
PHP scales up as well as it scales down!

29. Load Balancing

30. PHP-FPM > mod_php?

31. Distributing Load Properly

32. Offloading - Gearman

33. Offloading - Gearman

34. Offloading - ZeroMQ

35. Service Discovery with Zookeeper

36. APC Cache vs Memcached

37. Atomic Operations++

38. Vectors

39. PHP Arrays

40. Implementation

41. Present Day PHP Implementations
• C PHP (Defacto Standard)
• HHVM
• HipHop PHP
• Phalanger
• PHPPHP

42. PHP 7
Zend Engine 3.0
The Future of PHP

43. PHP-NG

44. PHP-NG

45. PHP-NG

46. Sherif Ramadan
@sr_googleguy
sheriframadan.com
Thank You!
!
Q&A