Almost every compiler is fast on toy-sized programs. E.g. the standard Java compiler is pretty fast, and uses little resources.
It becomes visible when you build a large project: you notice that when you face 100k LOCs, efficiency of every compiler's part starts to matter, and RAM usage may grow to uncomfortable levels if your compiler does not care enough.
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Almost every compiler is fast on toy-sized programs. E.g. the standard Java compiler is pretty fast, and uses little resources.
It becomes visible when you build a large project: you notice that when you face 100k LOCs, efficiency of every compiler's part starts to matter, and RAM usage may grow to uncomfortable levels if your compiler does not care enough.
Yes, some compilers are slow on large programs because they don't scale well. Others aren't, because they do. That's what I said.