Indexing content as it's created or updated

Hello, I'm trying to index the content on my site as soon as it's created or updated, I'm using solr as an Image Bank to search for images to use in nodes. I want to be able to search for images as soon as they are updated. Is there a way to trigger the indexing of the image entities that I just uploaded, I can't shorten my cron time because it has a lot of stuff attached.
Thanks