Analysis and then Database write queue

[y0014984]

To reduce the excessive write operations, I should use a write queue which writes only 5 values per second for example. The queue is filled in the updateStatistics section. If the key is not in the write Queue then it is appended. If the key is in queue only the value ist updated.

The needed informations for the queue are: [_playerUid, _eventId, _key, _value]

Before starting the should be a test if writing is really the problem or something else.