Remove defer statement in hot path
Remove defer statement in hot path

GoogleCloudPlatform/prometheus,Gouthamve/prometheus,Gouthamve/prometheus,kangwoo/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,kangwoo/prometheus,keegancsmith/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,alileza/prometheus,alileza/prometheus,prometheus/tsdb,prometheus/prometheus,Gouthamve/prometheus,prometheus/prometheus,keegancsmith/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,Gouthamve/prometheus,kangwoo/prometheus,keegancsmith/prometheus,Gouthamve/tsdb,keegancsmith/prometheus,kangwoo/prometheus,keegancsmith/prometheus,prometheus/prometheus,alileza/prometheus