Is the index getting rebuild when wp_insert_post is fired?

Hello

I’m using Relevanssi for searching a custom post type with custom taxonomies. It’s working very well, but I’m not totally sure if the index is getting rebuild automatically or if I have to make a cron job. I’ve read some old support threads but it’s not perfectly clear if that’s how it works.

I have built a plugin that automatically adds or updates custom posts with the “wp_insert_post” function. This happens every 15 minute using a wp cron schedule.

Is the index getting rebuilt automatically every time this function is executed?

Thanks