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Joshua Gross
2b062eadc8
Summary: The differ was still producing correct, but not minimal, instruction sets in some cases due to an optimization that was buggy. This affected cases where 2+ nodes were inserted at the beginning of a list. It would trigger the old behavior where all nodes after the first would be removed, deleted, then reinserted. See the test case (which was failing and now passed) and P128190998 (the 3->4 transition) for samples. Changelog: [Internal] Fabric differ Reviewed By: mdvacca Differential Revision: D20785729 fbshipit-source-id: 2fea6a816753066abb358ed7bb51003140cd5fc4