Is it possible to filter out some requests using Chrome developer tools, say, filter out all image requests?
There isn't a very flexible filtering feature, but the bar at the bottom does allow you to only show requests of a certain document or connection type:
You can't just exclude images, but it should help.
You can also press Control/Command+F to search for a particular string in the request list, and check the "filter" box to hide requests that don't match: