.

wcfs/internal/xbtree/δbtail.go

@@ -1273,31 +1273,19 @@ func (δBtail *ΔBtail) GetAt(root zodb.Oid, key Key, at zodb.Tid) (value Value,
 		panicf("at out of bounds: at: @%s,  (tail, head] = (@%s, @%s]", at, tail, head)
 	}
 
-//	// XXX locking
-
 	value = VDEL
 	valueExact = false
 	rev = tail
 	revExact = false
 
+	// retrieve vδT snapshot that is rebuilt to take Track(key) requests
 	vδT, err := δBtail.vδTSnapForTrackedKey(root, key)
-//	// XXX need to rebuild only if key was not rebuilt yet
-//	// XXX need to rebuild only for key, not for whole trackNew
-//	err = δBtail.rebuild1KeyIfNeeded(root, key)	XXX reenable
-//	err = δBtail.rebuild1IfNeeded(root)
 	if err != nil {
 		return value, rev, valueExact, revExact, err
 	}
-
 	debugfΔBtail("  vδT: %v\n", vδT)
 
-//	δTtail := δBtail.byRoot[root]
-//	if δTtail == nil {
-//		panicf("δBtail: root<%s> not tracked", root)
-//	}
-//	vδT := δTtail.vδT
 	// TODO key not tracked	-> panic  (check key ∈ lastRevOf  -- see vvv)
-
 	// TODO -> index lastRevOf(key) | linear scan ↓ looking for change ≤ at
 	for i := len(vδT)-1; i >= 0; i-- {
 		δT := vδT[i]