SNAP provides a tool to compute the best settings for a given operator, from SNAP (menu Tools/Options/Performance) or by directly launching the snap-conf-optimiser executable. snap-engine comes with a basic list of compatible operators that can be extended. This page explains how to add an operator to this list.
To add an operator or a list of operator to the list of benchmark operators:
Write a BenchmarkOperatorProvider
Extends the org.esa.snap.smart.configurator.BenchmarkOperatorProvider and implement the getBenchmarkOperatorAliases() method, which gives the list of operator aliases to be added the the benchmarkable operator list.