We made NotifyPull parallel to try to lower the load, and we initially measured
an improvement. However, we did the measurements with a profiler that did an
aggregation of the results. Our results had an high variance, so the mean load
was in fact not meaningful.
More careful measurement performed without doing any aggregation show that,
under load, relying on the fact that the scheduler schedules the tasks on time
is too risky, and that the code is fast enough to not have to parallelize.
MozReview-Commit-ID: CMhSn8Sc0OO
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extra : rebase_source : cfb41f861089bce9e10446bee81c13f8565ba90e
0640ca7fdb