The development of dCMS was predicated on excellent performance.
Here are other performance related projects for which we are known
Understanding FileMaker Server Performance
dsBenchmark - the FileMaker Server Load Tester
dsBenchmark is an open source tool built in Filemaker which enables Filemaker Server deployments to be automatically tested and benchmarked.
Download it here.
About the tool here.
What people are saying here.
A personal recommendation here.
Advising FMI on Performance
Ann Monroe's thanks is here.