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Garbage Collectors Are Scary
xpected to be invisible: if programmers (or even users) notice them, something is wrong. Usually, such problems are are performance problems, but there could be correctness issues as well.
As a hobby, I am working on a virtual instruction set architecture, mainly to better to understand the nature of computing, and eventually, trade-offs in programming language design. At run time, the virtual machine interpreter does not need to perform any type checking because apart from register-to-register moves, separate instructions are used for scalar and pointer values. This approach based on redundant data (comparing the garbage collector results against the pointers known to be there) makes it straightforward to do end-to-end testing for the object scanning code.
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