> those 5 lines generate hundred thousands of lines of code behind the scene. That's part of the problem; most of the time, the "thousands of lines of code" t

> those 5 lines generate hundred thousands of lines of code behind the scene. That's part of the problem; most of the time, the "thousands of lines of code" that are created from type-generic code have a lot of useless duplication, and the compiler has trouble coalescing the duplicated and redundant code (I don't even think a serious attempt is made, AIUI). There's a lot of scope for improvement.