500ms with good consistency--jitter caused by other processes (of course).
diff --git a/sequence.go b/sequence.go
index a83b134..8c1d47f 100644
--- a/sequence.go
+++ b/sequence.go
@@ -6,6 +6,8 @@
 	return &Sequence{InitialSequenceValue}
 }
 
+// TODO: aligned read/write: https://groups.google.com/forum/#!topic/golang-nuts/XDfQUn4U_g8
+
 const (
 	MaxSequenceValue     int64 = (1 << 63) - 1
 	InitialSequenceValue int64 = -1