When I add data to the database, I use a merge something like this:
MERGE (n:Thing { uid : <the uid>}) ON CREATE SET n.prop1 = blah1, n.prop2
= blah2 ...
Since I'm working in a multi-threaded environment, it's possible to have
the same node written twice and I've seen many instances where duplicate
nodes are created. SO
I have an index on the uid.
CREATE CONSTRAINT ON (n:Thing) ASSERT n.uid IS UNIQUE
Before creating the index, those merges were taking 1-50ms, now they take
20-300ms. Other operations like adding relationships seem to be taking
quite a bit longer too.
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