[lederhosen]

I can not create a really mean example because Go is Turing complete. That means that everything can (with a few extra lines) be expressed in Go.

The problem with your mutex solution is at least two:

1) it is more complex

* more lines to type and read and check and thus harder to understand

* you can forget the mutex

* if you have data structures of hastables, you will have to pass mutexes around or store them together with the tables.

2) it is not nearly as performent as a lock free hash table

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