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What are Dead Code Classes?

vFunction can automatically detect classes that should be excluded from a domains or the common library, even though there are compile time dependencies from classes in the domain/common library to these classes. These classes are called Dead-Code Classes.

Note that a class may be a Dead-Code Class in one domain but used by other domains, while a dead-code common class (in the common library) is excluded from the entire application / all domains.

A user may decide to mark any pure-static class as dead-code. Dynamic classes cannot be marked as dead-code as actual usage of these classes was sampled by the Agent. All the classes associated to the scope of the domain due to dependencies from a Dead-Code Class will be automatically marked as dead-code too.

A user may verify a class as dead-code, which will mark it for future analysis runs, or unmark a class as dead-code which will prevent the analysis from identifying it as dead-code again.

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What is the Minimum Dead-Code Tree Size?

The analysis parameter Minimum Dead-Code Tree Size controls the threshold of the minimum length of the dependencies chain from a dynamic class to a pure static class that would cause marking pure the static class as dead code. The lower the number, the shorter the required length of the chain.

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How to Automatically Remove Dead-Code Classes From Domains

If you check Enable Auto Refactoring in the Analysis Parameters dialog, then references to the dead-code classes will be removed from the classes in the domains/common library. The modified classes are called Partial Classes. Partial Classes will be listed with * next to their name in the static classes list as seen in the screen shot below (for example: ProductService* class). The implementation name of partial class have an _vf_ followed by a uuid suffix (e.g., ProductService_vf_17a316a).

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