Exporting to csv

[borjagarciab]

Describe the bug
Hello,
Im just trying to export to csv the products filtered by manufacturer, but the website just loading until time out.

To Reproduce
Just filter by manufacturer and go to export to csv

Additionnal information
I was looking how prestashop export the products.
It works with symphony too,
The function to export just need an array of products.
By default i cant see where prestashop assign that array...

I'll keep trying to solve it, but if you can see where is the bug before me, better for all.
Have a nice day.