Handling out of order execution

Question

I recently stumbled upon this Wikipedia article. From my experience with multi-threading I am aware of the multitude of issues caused by the program being able to switch threads

Answer 1

The factor of the matter is that if you're only just starting to deal with multithreaded code (to the point that you're explicitly talking about thread scheduling as if it's somewhat scary [not to say it isn't, but for different reasons]), this is happening at a much, much lower level than you need to worry about. As others have said, compilers will not do this if it cannot guarantee correctness, and while it's good to know that technologies like this exist, unless you're writing your own compiler or doing really bare metal stuff, it shouldn't present an issue.