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Subject [GitHub] [pulsar-client-go] merlimat opened a new pull request #298: Added semaphore implementation with lower contention
Date Wed, 24 Jun 2020 00:15:26 GMT

merlimat opened a new pull request #298:
URL: https://github.com/apache/pulsar-client-go/pull/298

   ### Motivation
   When there are multiple go-routines sharing a single producer instance, there can be significant
contention on the channel that is used as a semaphore. 
   That is because the channel is internally implemented with a mutex.
   Instead, use a counter to optimize for the normal case scenario (when we're not blocked
by the semaphore), leaving the channel as a way to synchronize when the semaphore has exhausted
all the permits.

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