V8.4 - Loading or publishing a node that has a base64 image takes a long time

I tried to insert an image inside the RTE which its source is base64 code like the below:

<img src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEAYABgAAD/2wB........">

The image immediatly appeared in the RTE, but when I saved & published the node, it took about 15 minutes to finish.

Then I tried to open that node, and the same time has been taken to to be loaded

Umbraco version

I am seeing this issue on Umbraco version: 8.4

Steps to reproduce

1- Create a new node with a RTE property 2- Insert an a base64 image inside the RTE 3- Save & publish

Expected result

Saving & Publishing / Loading a node should be done quickly

Actual result

Long time to finish

[lars-erik]

A colleague just discovered this in a site under development that we haven’t got around to patch to 8.7 yet.
I just thought I’d stop by and share the following since y’all have been so nice and made it so I didn’t have to write up an issue. 😁👍
#H5YR

Now read this, whoever still thinks we should use Regex to parse HTML:
https://stackoverflow.com/a/1732454/937791

[saifobeidat]

I’ve noticed previously that if a base64 image is embedded in the RTE, it can cause random CPU spikes. This can cause websites to become unresponsive. I’m guessing it’s down to indexing. Once I identified this image was causing the problem, we removed it and the CPU spikes disappeared.

I’d recommend not adding base64 encoded images into the RTE editor for this reason, or making sure this issue is addressed too.

Yes, I wouldn’t add base64 images to my website, but I am migrating content form external DB, and it has a lot of records containing base64 images, so it’s not easy to remove those images.