This document discusses improving the performance of a Magento e-commerce site. It identifies several key issues affecting performance, including slow PHP execution, unused modules, and inefficient image delivery. It also outlines changes made to address these problems, such as updating PHP, removing unnecessary modules, improving caching, and implementing performance testing. With these changes, page load times were significantly reduced and conversion rates increased.

1. COMPANY CONFIDENTIAL – DO NOT DISTRIBUTE1
22.
September
2015
Harald
Zeitlhofer,
Dynatrace
harald.zeitlhofer@dynatrace.com
@HZeitlhofer
Improve
Magento
Performance
To
Drive
Higher
Conversions

2. COMPANY CONFIDENTIAL – DO NOT DISTRIBUTE2

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• Major
problem
in
November
2014
• Magento
Shop
was
actually
too
slow!
• Infrastructure
was
very
limited
at
that
Lme
• Scale
Infrastructure
?
• Get
external
advice
• The
real
problems
were
hidden
that
Lme
Performance
threatens
goals

4. COMPANY CONFIDENTIAL – DO NOT DISTRIBUTE4
lessc
CSS
pre-­‐
processor
social
login
module
PHP
execuLon
was
really
slow
during
the
first
analysis
session
we
iden2fied

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average contribution of
PHP compilation time
Slow
PHP
execuLon

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PHP compilation time could
be reduced considerably just
by using PHP 5.5 + Opcache!
ARer
update
to
PHP
5.5

7. use
latest
versions
of
used
technology

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PHP execution presented
a major global bottleneck
for page load times
Performance
hotspot:
PHP
execuLon

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less
CSS
preprocessor

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less
CSS
preprocessor

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errors
in
PHP
execuLon

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server-side calls to
unused external services
Social
Login
Modul

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Using
external
services
performance
hotspot
/en/externalprice/

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response
Lme
hotspot
PHP

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slow
SAP
connector
?

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session
data
locking
response
Lme
hotspot:
usleep();

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• CM_RedisSession
uses
usleep()
in
locking
logic
• session_start()
locks
session
file
• only
lock
if
required
• session_write_close()
releases
lock
PHP
session
locking

18. COMPANY CONFIDENTIAL – DO NOT DISTRIBUTE18
• New
feature:
show
stock
and
leadLmes
• Calculated
on-­‐the-­‐fly
• Very
bad
performance
impact
Inhouse
development
• Design
change:
pre
calculate
and
cache
• Workflow
change:
test
automaLon
including
performance
tests

19. know
your
code
know
your
external
libraries
evaluate
carefully
before
using

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Modern
Web
Pages:
lots
of
staLc
content
434
Resources
in
total
on
that
page:
230
JPEGs,
75
PNGs,
50
GIFs,
…
more
than
20MB
page
size

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Not
following
Web
Performance
Best
PracLces
282!
Objects
on
that
page
9.68MB
Page
Size
8.8s
Page
Load
Time
Most
objects
are
images
delivered
from
the
main
domain
Very
long
connect
Lme
(1.8s)
to
the
CDN

23. use
proper
caching
pack
JS,
CSS
use
sprite
for
images
use
CDNs

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cached
content
sLll
creates
roundtrips
!

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Original
Web
Request
handling

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New
Web
Request
handling

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more information:
http://apmblog.dynatrace.com/2014/10/30/proper-configuration-running-php-nginx/
http://www.slideshare.net/HaraldZeitlhofer/php-conference-berlin-2015-running-php-on-nginx
NGINX

28. use
proper
server
tools

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Status
Quo
• Infrastructure
has
changed
significantly
• New
design
and
review
process
• Test
automaLon
with
performance
tests

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CharLng
data
in
business
dashboards

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PosiLve
impact
on
conversion
rate

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www.dynatrace.com
Thank you !!!
Harald
Zeitlhofer
Performance
Advocate
#HZeitlhofer
harald.zeitlhofer@dynatrace.com
hmp://blog.dyntrace.com
Dynatrace
Free
Trial:
hmp://bit.ly/dmrial