Slow image load handling

[ostapski]

There is a huge bottleneck in the code (v1.7.10 - line 471):

This happens on pages with large amount of images (3000+) hiding element forces partial page re-render ... slowing image handling almost to still stand (one image per/sec)

once commented out - 30-50 images could be loaded in a second without any other changes

[dkern]

That sounds more like wrong usage to me. Its unlikely that you have 3000 images in your viewport. But Lazy only handles the images in viewport. It sounds to me like your images don't have an initial size. Therefore the default size of your images is 0x0px. So on page load ALL your images fit in the viewport of the browser, so every image will be loaded at once what of course is not great. But I never had problems with large pages / galleries if the images had correct dimensions.