Benchmark Regressions

This is a list of explanations for regressions in the Benchmark Suite.

sharpsatbench

sharpsatbench performance improves by about 20% in 71bb64df71, and then regresses by about 7% in 876615e258. Both are due to changes in Corlib's qsort implementation. The first change implements a fallback to insertion sort for small arrays, the second change fixes a bad performance regression, but also regresses performance overall.