Question

按对象大小，选择不同分配策略。

// malloc.go

// implementation of new builtin
func newobject(typ *_type) unsafe.Pointer {
	return mallocgc(typ.size, typ, true)
}

// Allocate an object of size bytes.
// Small objects are allocated from the per-P cache's free lists.
// Large objects (> 32 kB) are allocated straight from the heap.

func mallocgc(size uintptr, typ *_type, needzero bool) unsafe.Pointer {
	
    // 零长度对象（zero）
	if size == 0 {
		return unsafe.Pointer(&zerobase)
	}
    
	if size <= maxSmallSize {
		if noscan && size < maxTinySize {
            // 微小对象（tiny）...
		} else {
            // 小对象（small）...
		}
	} else {
        // 大对象（large）...
	}

	return x
}