Use a semaphore instead of WaitGroup for FlatMap parallelism. #168
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The WaitGroup method used has an uneven work load distribution. It will create up to `maxInParallel` goroutines and then wait for them ALL to complete before starting another `maxInParallel` goroutines and so on. Using a semaphore instead, it will try to keep up to `maxInParallel` goroutines processing all at the same time.
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Conflictless PR version here: #189 |
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The WaitGroup method used has an uneven work load distribution. It will
create up to
maxInParallelgoroutines and then wait for them ALL tocomplete before starting another
maxInParallelgoroutines and so on.Using a semaphore instead, it will try to keep up to
maxInParallelgoroutines processing all at the same time.