Merge branch 'reduce_memory_consumption' into 'v2'

Reduce memory consumption

See merge request !130

mem/storage.go

@@ -46,7 +46,7 @@ func NewStorage(capacity uint64) *Storage {
 	storage := new(Storage)
 
 	storage.Capacity = capacity
-	storage.unitSize = capacity / 16
+	storage.unitSize = 4 * KB
 	storage.data = make(map[uint64]*storageUnit)
 
 	return storage