IE10+ Huge freeze if file >3mb with preview enabled

[Kiblyn11]

I'm able to reduce the freeze time (10 sec instead of 2mn) by commenting the line 2467.
objUrl.revokeObjectURL($img.attr('src'));

Do someone know what is the impact of commenting this line ?

Steps to reproduce the issue

1. Initialize the plugin with showPreview: true and ajaxUpload
2. Browse and choose a file > 3mb on IE10+
3. Observe that IE hang for about 2 minutes

Environment

Browsers

• Internet Explorer

Operating System

• Windows

Computer

i7, 8gb RAM

[kartik-v]

The revokeObjectUrl is supposed to actually release browser memory for the cached Blob that generates the data url for reading the file/image.

Some of these FAQs like this here and this article here explains this concept.

Would like to know if there is a JS fiddle or a code to test and reproduce and see your configuration.

[kartik-v]

BTW... You can set showPreview to false for accelerated file selections as that will not read the file content into memory.

[Kiblyn11]

The thing is, I need the preview :)
What do you think about releasing the memory asynchroniously ? --> Same result, IE freeze
To avoid freeze, as its not something we need to wait for.

Edit : Im gonna do a jsfiddle

[Kiblyn11]

Here is the JsFiddle : https://jsfiddle.net/braylath/3vtqu1wa/3/
Tested with this image : http://imgur.com/a/2UdbV
Tested with : Edge, Edge IE10 document mode

Remark : Seems its only slow at the first upload (need to clean cache after to reproduce)

[kartik-v]

I can confirm that I can see this issue specific to IE10 as described above while for other browsers (including Chrome/FF/Safari/IE 11/Edge) it seems to work fine.

Will need to check on setting options specific to this. Doing a browser specific fix is always irritating 😠 ,

[HusamAamer]

I have the same issue in Safari :(

[kstolarczyk]

Still freezing on IE 10/11

[kartik-v]

Folks this is entirely browser and your client h/w memory specific when you wish to preview large files. As an alternative disable client previews if you wish to handle large files. Initial Preview after server upload can still be shown,

Refer a stack overflow question