Question

Which of the following reasons explains why an explicit free list implementation has better performance than an implicit free list implementation? Select all that apply.

1.Immediate coalescing when freeing a block is significantly faster for an explicit free list.

2.The implicit free list includes every block in the heap, whereas the explicit free list includes only the free blocks, making it faster to find a suitable free block.

3.Inserting a free block into an explicit free list is significantly faster since the free block can be inserted at the front of the list, which takes constant time.

Answer 1

Explicit List vs Implicit List:

2.The implicit free list includes every block in the heap, whereas the explicit free list includes only the free blocks, making it faster to find a suitable free block.

3.Inserting a free block into an explicit free list is significantly faster since the free block can be inserted at the front of the list, which takes constant time.

Therefore, from the given points, 2nd and 3rd apply. The first does not apply here because coalescing is a bit complicated in explicit list, while it is constant time in implicit.