Performance tuning – set expectations, measure, tune, and repeat
Performance tuning requires a disciplined approach where:
Expectations regarding performance characteristics are clearly defined, including measurable performance counters, alongside conditions under which measures are taken.
A current performance of a system is measured and cross-checked with expectations.
If a system is not up to the expected standards, then performance bottlenecks need to be identified and fixed. After a fix is performed the whole process of measuring needs to be repeated to prove that a fix brings system performance to expected levels or identify further bottlenecks.
There are two very important lessons that we can draw from the process sketched earlier. First of ...
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