Why is compiler optimisation necessary? How would you use one as a programmer? Exists a scenario in which you would not want to use one of these devices?

The effectiveness and accuracy of a compiler depend on the compiler's ability to take into account a number of factors. Explain.

How can you "optimise" a compiler? When should a programmer use one of these? When is such a gadget impolite?

Where can I get a comprehensive explanation of the meaning of the term "optimise compilers" as well as the correct way to apply it? Why would you ever need one of these if you are working in the field of programming? When would it be completely unacceptable to use one of these electronic devices?

For what reasons is it important to optimize compilers? Is there anything there a coder may find useful? When would it be inappropriate to utilize such a device?

Why is compiler optimization necessary? How would you utilize one as a programmer? Exists a scenario in which you would not wish to use one of these devices?