Please add the following indexes to ezinfocollection_attribute

ALTER TABLE `ezinfocollection_attribute`
ADD INDEX `Index_3`(`contentobject_id`),
ADD INDEX `Index_4`(`contentobject_attribute_id`),
ADD INDEX `Index_5`(`contentclass_attribute_id`),
ADD INDEX `Index_6`(`informationcollection_id`);

Note: 'Index_3' already exists in newer eZ versions but we need the rest too.

we have 40000 rows of data in ezinfocollection_attribute the performance is just too bad when exporting the data. Each query to eZInformationCollection::informationCollectionAttributes took 1 sec to execute. I just can`t wait > 11 hours till all data is exported.