Friday, March 2, 2012

tuning/optimization needs "targeted" input data

My personal focus is performance profilers for latency engineering, but this principle also applies to other tuning -- tuning needs "targeted" even "biased" input data, biased towards the latency-critical scenarios.

See also the post on 80/20.

The "80/20" item in [[More Effective C++]] points out that we must feed valid input data set to performance profiler. It think it's easy to get carried away by a good quality profiler's findings, without realizing that the really important users (who?) or the critical operations may not be represented by the test case.

This sounds like more than an engineer's job duty -- find the relevant input data sets that deserve performance-profiling most. Perhaps the business analyst or project manager knows who and what functionality is performance-critical.

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New York (Time Square), NY, United States
http://www.linkedin.com/in/tanbin