framework: reduce croutine memory usage
framework: reduce croutine memory usage

ycool/apollo,ApolloAuto/apollo,xiaoxq/apollo,ycool/apollo,wanglei828/apollo,jinghaomiao/apollo,wanglei828/apollo,xiaoxq/apollo,jinghaomiao/apollo,jinghaomiao/apollo,ycool/apollo,ycool/apollo,ApolloAuto/apollo,wanglei828/apollo,jinghaomiao/apollo,wanglei828/apollo,ApolloAuto/apollo,ycool/apollo,ApolloAuto/apollo,wanglei828/apollo,xiaoxq/apollo,ycool/apollo,jinghaomiao/apollo,xiaoxq/apollo,xiaoxq/apollo,jinghaomiao/apollo,wanglei828/apollo,ApolloAuto/apollo,ApolloAuto/apollo,xiaoxq/apollo