You've have a point. But then, it's a bench mark and it would not be the first time that a bench is done using different settings than in production. Like I said, that lmdb is used in OpenLDAP doesn't automatically mean it is used with the exact same configuration as in the benchmark ;-) Nor did I say a memory store is bad, it's just you're not comparing the same things. Redis could be added to the bench for instance.
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You've have a point. But then, it's a bench mark and it would not be the first time that a bench is done using different settings than in production. Like I said, that lmdb is used in OpenLDAP doesn't automatically mean it is used with the exact same configuration as in the benchmark ;-) Nor did I say a memory store is bad, it's just you're not comparing the same things. Redis could be added to the bench for instance.
IMO main-memory stores are bad, for multiple reasons. LMDB is not a main memory store, it is a fully ACID-compliant transactional store.