如何在内存中布局结构数组？

type Point struct {
     x, y int
}

var arr [4]Point

How will the array be laid out in memory?

Will the actual objects be laid out side by side

[Point[x][y]][Point[x][y]][Point[x][y]][Point[x][y]]

Or will the array be a array of pointers, with the objects stored elsewhere, like Java?

[&Point0][&Point1][&Point2][&Point3]

Somewhere in the heap:

...[Point0[x][y]] ... [Point1[x][y]] ....  [Point3[x][y]] ... [Point2[x][y]]

Also, how will make() lay out slices in memory?

make([]Point, 10)

The 4 Points will be contiguous in memory, as in your first example. If you want them to be pointers, then you'd need [4]*Point.

A slice of Point creates a slice that uses (points to) a backing array, where, again, Points would be side-by-side (and []*Point would be a slice of pointers to Point).

See http://research.swtch.com/godata for a good explanation of memory layouts of Go data structures.