improve updateDirectives performance
improve updateDirectives performance

leemotive/vue,Hanks10100/vue,greennyreborn/vue,KingMario/vue,xueyaodeai/vue,KingMario/vue,lizhiyao/vue,vuejs/vue,Kingwl/vue,Jinjiang/vue,lizhiyao/vue,cnchanning/vue,xueyaodeai/vue,Ddder-FE/vue,Kingwl/vue,cnchanning/vue,Jinjiang/vue,cnchanning/vue,KingMario/vue,greennyreborn/vue,Ddder-FE/vue,Ddder-FE/vue,lizhiyao/vue,hanhongyuan/vue,leemotive/vue,optimizely/vue,xueyaodeai/vue,leemotive/vue,hanhongyuan/vue,Ddder-FE/vue,hanhongyuan/vue,leemotive/vue,Jinjiang/vue,lizhiyao/vue,Hanks10100/vue,vuejs/vue,hanhongyuan/vue,greennyreborn/vue,Hanks10100/vue,Kingwl/vue,xueyaodeai/vue,vuejs/vue,Hanks10100/vue,Kingwl/vue,greennyreborn/vue,KingMario/vue,Jinjiang/vue,vuejs/vue