[OAK-3494] MemoryDiffCache should also check parent paths before falling to Loader (or returning null)

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.25, 1.2.9, 1.3.10, 1.4
• Component/s: core, mongomk
• Labels: performance
• Assignee: Marcel Reutegger
• Reporter: Vikas Saurabh
• Created: 07/Oct/15 13:55
• Updated: 26/Sep/19 11:39
• Resolved: 27/Oct/15 12:58

Description

Each entry in MemoryDiffCache is keyed with (path, fromRev, toRev) for the list of modified children at path. A diff calcualted by DocumentNodeStore.diffImpl at '/' (passively via loader) or JournalEntry.applyTo (actively) fill each path for which there are modified children (including the hierarchy)

But, if an observer calls compareWithBaseState on a unmodified sub-tree, the observer will still go down to diffImpl although cached parent entry can be used to answer the query.