optimse common one->one mapping case
optimse common one->one mapping case

one->many is much rarer

alban/scope,kinvolk/scope,alban/scope,kinvolk/scope,kinvolk/scope,weaveworks/scope,weaveworks/scope,kinvolk/scope,weaveworks/scope,kinvolk/scope,weaveworks/scope,weaveworks/scope,kinvolk/scope,alban/scope,alban/scope,weaveworks/scope,alban/scope,alban/scope