The full build breakdown
Does pinging a search index get new pages seen sooner?
In progressA test of whether telling search engines about changed pages speeds up discovery.
What you can learn
How quickly new pages are picked up, and which engines act on a ping. IndexNow is used by Bing and others, but Google does not use it, so Google timing is a separate, slower measure.
What actually exists
A key file and a daily job that checks the sitemap for changed pages and pings only when something changed. It has not yet been measured against a control.
The next decision
Connect Bing Webmaster Tools, then compare days from publish to first seen for pinged and unpinged pages.