my slides about PHP application performance, presented at the Sydney PHP meetup in April 2015

1. 1
PHP#Sydney#
April#2014#
harald.zeitlhofer@dynatrace.com#
@HZeitlhofer#
PHP#Applica=on#Performance#
Harald#Zeitlhofer#
#

2. 2
• Technology#Strategist#at#Dynatrace#
• Database#and#Web#Development#
• PHP#for#more#than#15#years#
• Always#up#for#new#things#
Harald#Zeitlhofer#

3. 3
Applica'on*Performance*

4. 4
Failures happen!
Nobody likes it when …

5. 5
Unless you work for
Google or Microsoft !

6. 6
… or this …

7. 7

8. 8
... as it leads to ...

9. 9

10. 10
... and finally to ...

11. 11

12. 12
Yes, failures happen!!
but we can identify
and/or avoid them !

13. 13
~*20*%#

14. 14
Performance#Tools#

15. 15
some*use*cases*
and*best*prac'ces*

16. 16

17. 17
Not#following#Web#Performance#Best#Prac=ces# 282!$Objects#
on#that#page#
9.68MB#Page#Size#
8.8s$Page#Load#
Time#
Most#objects#are#images#
delivered#from#the##
main#domain#

18. 18
Overloaded#pages,#lots#of#sta=c#content#
434$Resources$in#total#on#that#page:#
230#JPEGs,#75#PNGs,#50#GIFs,#…#
total%page%size%20$MB$!!!#

19. 19
pack*JS,*CSS*files*
*
use*sprites*for*images*
*
use*proper*caching*
*

20. 20
cached#content#
can#s=ll#create#roundtrips##
to#the#network!#

21. 21
Web#Request#handling#
run#PHP#in#external#process#rather#than#loaded#into#apache.#
consider#using#Nginx#+#PHP^FPM#

22. 22
mind*your*environment*
*
configure*properly*
*

23. 23

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frustrated#users#
slow#user#ac=on#
response#=me#

25. 25
errors#in#PHP#execu=on#

26. 26
iden'fy*response*'me*hotspots*

27. 27
less#library#caused#
performance##
hotspot#
drill*down*to*find*the*root*cause*

28. 28
know*your*code*
*
know*your**
external*libraries*
*

29. 29

30. 30

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/katgrp/browse#

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/katgrp/get/$/1626#

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/cave/browse/gis/$/katgrp/1626#

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/cave/browse/gis/$/katgrp/1626#–#applica=on#context#

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Sessions#in#PHP#
• session_start()#locks#the#file#where#session#data#are#stored#
• Released#when#script#ends#
• Use#session_write_close()#to#unlock#the#file#before#execu=ng#slower#code#
• Or#create#your#own##
session#handler#with##
session_set_save_handler()#

36. 36
Looks#beher#now…#

37. 37

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performance#hotspot#
/en/externalprice/#

39. 39
response#=me##
hotspot#PHP#

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session#data#locking#
response#=me#hotspot:#
usleep();*

41. 41
be*careful*with*locking*
*
only*lock*when*required,*
release*lock*
as*soon*as*possible*

42. 42
Locking#problem#solved,#but#…#

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/katgrp/browse#server#side#execu=on#
=me#to#check##
the#database#

44. 44
From#the#DB#perspec=ve#
Check#for#proper#indexes!#
#
Occasionally#full#table#scans#are#
performed#even#though#indexes##
are#available,#especially#in#complex#
queries.#Some=mes#only#a#rewrite#
of#the#query#helps.#

45. 45
Here#we#go:#

46. 46
mind*the*database*!!!*
*

47. 47
anything#else#we#can#do?#
what*about**
3rd*party*content?*

48. 48
3rd#party#content#

49. 49
3rd#party#content#

50. 50
watch*external*services*
*
be*aware*there*are*
services*you**
can't*control*
*

51. 51
But still,
failures happen!!
identify them as soon
as possible

52. 52
End^To^End#Transac=on#Monitoring#

53. 53
... to make sure that ...

54. 54

55. 55
• Load#Generator##
(Apache#Benchmark,#Selenium,#JMeter)#
• Firebug,#Google#Developer#Tools#
Dynatrace#Ajax#Edi=on#
• Google#PageSpeed#
• Dynatrace#Free#Trial#
• Free#trial#license#for#30#days#
• Free#personal#license#for#developers#
My#favorite#tools#
hhp://bit.ly/dhrial#

56. 56
www.dynatrace.com#
Thank#you#!!!#
Harald*Zeitlhofer*
Senior#Technology#Strategist#
#HZeitlhofer#
harald.zeitlhofer@dynatrace.com#
hhp://blog.dyntrace.com#