Optimized getNamespaceId.
Optimized getNamespaceId.

kinncj/annotations,codesource/annotations,wuxu92/common,gencer/common,TomasVotruba/common,ptlis/common,iamluc/annotations,FabioBatSilva/annotations,racheldomingo/common,crazycodr/annotations,doctrine/common,guiwoda/common,Ocramius/common,dunglas/common,iainconnor/annotations,doctrine/annotations,Majkl578/doctrine-common,sachintaware/common