optimization, judge the empty status of a directory, perform a shallow search instead of a deep enumeration
optimization, judge the empty status of a directory, perform a shallow search instead of a deep enumeration

stephanheilner/ZipArchive,soffes/ssziparchive,ZipArchive/ZipArchive,soffes/ssziparchive,ZipArchive/ZipArchive,soffes/ssziparchive,stephanheilner/ZipArchive,ZipArchive/ZipArchive