explain why I wrote that

Author: lavalamp

fieldpath/element.go

@@ -145,6 +145,8 @@ type PathElementSet struct {
 
 type sortedPathElements []PathElement
 
+// Implement the sort interface; this would permit bulk creation, which would
+// be faster than doing it one at a time via Insert.
 func (spe sortedPathElements) Len() int           { return len(spe) }
 func (spe sortedPathElements) Less(i, j int) bool { return spe[i].Less(spe[j]) }
 func (spe sortedPathElements) Swap(i, j int)      { spe[i], spe[j] = spe[j], spe[i] }