sitewards / import_image_memory_leak_fix

Fix a memory leak issue with the product image import process.

Sitewards ImportImageMemoryLeakFix

Issue

Product import with images easily goes over 4Gb on memory with just couple hundreds of products. The reason for this is that the image model is never properly destoried.

Fix

Use a different image processor than Varien_Image. Add a destruct method into this new processor and register it on shutdown. Rewrite Mage_Catalog_Helper_Image to change the method validateUploadFile. Call new processor, call destruct and then return the mime type of the image.