5 most common errors in Magento and how to fix them

1. Magento – performance/optimalisation
Marek Borzęcki

2. • Serwer Gearman – it allows to process
asynchronically and synchronically
• FACT-finder – advanced search engine
• Cacheing on many levels
• Clients in 2 types: OPEN and PARTNER
Sklep.tim.pl –elektrotechnical stuff
Conquer the 5 Most Common Magento Coding
Issues to Optimize Your Site for Performance -
Magento Expert Consultin Group

3. Magento Expert Consulting Group
Top 5 Magento PHP code performance
lSpurce:
http://Conquer_the_5_Most_Common_Magento_Coding_Issues_to_Optimize_Your_Site_for_Performance.pdf

4. WRONG
OK
1. SQL queries inside a loop

5. 1. SQL queries inside a loop ...
larray of Magento
lproducts
l12 GB RAM
l16x Intel® Xeon® CPU
lrunning at 2.40GHz
lPHP 5.3.19

6. 1. SQL queries inside a loop ...

7. 1. SQL queries inside a loop ...

8. 2. Loading the same model multiple times
WRONG
OK

9. 2. Loading the same model multiple times ...

10. 3. Redundant dataset utilization
WRONG
OK

11. 3. Redundant dataset utilization ...
WRONG
OK

12. 3. Redundant dataset utilization ...
WRONG
OK

13. 4. Calculating the size of an array on each iteration of a loop
WRONG
OK

14. 4. Calculating the size of an array on each iteration of a loop ...
larray of Magento
lproducts
l12 GB RAM
l16x Intel® Xeon® CPU
lrunning at 2.40GHz
lPHP 5.3.19

15. 5. Inefficient memory utilization
WRONG
OK

16. • Some operations are done with SQL
eg. Via WHERE or JOIN
• die() oraz exit() – unexpected system
behavior
• It is not allowed to use business logic
in PHTML
Others

17. • Always put attention to the critical parts
of code
• Think clearly and use reasonable
arguments
• Think in advance
Summary