Switch
Defects in multi-way branch constructs, where the shape of a switch rather
than any single expression is the problem. As the number and weight of branches
grow, the construct stops being a clean dispatch and becomes a maintenance and
performance liability.
The entries here concern the cases themselves: a switch carrying too many branches signals logic that has outgrown the construct and likely wants a table or polymorphism instead, while individual cases holding non-trivial bodies can defeat the compiler’s jump-table optimisation and turn dispatch into a chain of comparisons.