Because of the increasing use of object-oriented database systems, special benchmarks have been developed to analyze performance. The benchmarks show unanimously that object-oriented systems are wellsuited for applications that manage complex structures. Particularly, object-oriented database systems provide higher performance than relational ones. This is proven by synthetic schemas and elementary operations such as inserts and traversals, which are supposed to be characteristic for a lot of objectoriented applications. This experience report presents the results of a real application-specific investigation, comparing three commercial object-oriented database systems. The tests we performed took the elapsed times of an application "as a whole." In spite of having characteristics similar to standard benchmarks, we obtained huge performance differences. To put it in a nutshell, standard benchmarks are not always meaningful and should not cause one to jump to conclusions.

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