improve performance of scanning files
improve performance of scanning files

add more debug logging

daishaowei/dpark,304471720/dpark,Mignet/dpark,yanheven/dpark,veritynoob/dpark,yhj630520/dpark,yanheven/dpark,windreamer/dpark,douban/dpark,smarthomekit/dpark,windreamer/dpark,304471720/dpark,douban/dpark,mageia/dpark,douban/dpark,oceanjack/dpark,yhj630520/dpark,ee08b397/dpark,Mignet/dpark,smarthomekit/dpark,304471720/dpark,windreamer/dpark,douban/dpark,zzl0/dpark,quxiaolong1504/dpark,fe11x/dpark,veritynoob/dpark,fe11x/dpark,oceanjack/dpark,veritynoob/dpark,junmoa/dpark,dogeyes/dpark,yhj630520/dpark,junmoa/dpark,dogeyes/dpark,zzl0/dpark,daishaowei/dpark,mageia/dpark,douban/dpark,windreamer/dpark,smarthomekit/dpark,quxiaolong1504/dpark,dogeyes/dpark