Here, we execute 100 coroutines in a loop.
If we were forking threads for each of these coroutines, this would be expensive
in terms of memory and CPU time. However, the threads are determined by the
Dispatcher, not the coroutine itself. While we have 100 coroutines, we have one
Dispatcher, and it happens to have one thread. So, all 100 coroutines will
run on one thread, switching between the coroutines when Kotlin encounters a
suspend function.
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