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Changes between Initial Version and Version 1 of Ticket #16215, comment 59

initial	v1
2	2
3	3	`wp_check_post_lock()` would return false when checked for the current user but we can look at `get_post_meta( $post->ID, '_edit_lock', true )` for the lock "freshness" (regardless of the user) and prevent updating the revisions if the post was locked a few seconds ago.
	4
	5	Edit: on second thought, that can miss if two requests come in at the exact same second, so probably not good enough.