Question: About Deque

[hdheid]

May I ask why there is an additional multiplication by 1.2 here?

// shrinkIfNeeded shrinks the deque if it has too many unused space.
func (d *Deque[T]) shrinkIfNeeded() {
	if int(float64(d.segUsed()*2)*1.2) < cap(d.segs) {
		newCapacity := cap(d.segs) / 2
		seg := make([]*Segment[T], newCapacity)
		for i := 0; i < d.segUsed(); i++ {
			seg[i] = d.segs[(d.begin+i)%cap(d.segs)]
		}
		u := d.segUsed()
		d.begin = 0
		d.end = u
		d.segs = seg
	}
}