package lattice

import "sync"

// neighborPool caches []uint32 slices to reduce GC pressure.
// Slices are returned with length 0 and capacity 8.
var neighborPool = sync.Pool{
	New: func() any { return make([]uint32, 0, 8) },
}

// getNeighborSlice returns a pre-allocated neighbor index slice from the pool.
func getNeighborSlice() []uint32 {
	return neighborPool.Get().([]uint32)[:0]
}

// putNeighborSlice returns a neighbor index slice to the pool.
func putNeighborSlice(s []uint32) {
	clear(s)
	neighborPool.Put(s[:0])
}