Which is correct?

o.Lock()
o.data[i] = true
o.Unlock()

or

o.Lock()
i.RLock()
o.data[i] = true
i.RUnlock()
o.Unlock()

The latter actually seems to help high contention R/W operations on a very 
large map according to the guy in my team who was working on the problem, 
but I would have thought the former example is correct.

Thanks for your advice.

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