On Nov 30, 2013, at 4:08 AM, Stephen J. Butler wrote: > Have you profiled your code to see what calls exactly are taking the most > time? I have a feeling it's these: > > isFilePackageAtPath > kLSItemInfoIsInvisible > kFSNodeLockedMask > kFSCatInfoCreateDate > kFSCatInfoContentMod > kFSCatInfoBackupDate > kFSCatInfoAccessDate > > And parsing "ls" output won't get you these (besides, parsing "ls" is a > dirty hack anyway). You probably want to try dropping down to > CFURLEnumerator and asking it to prefetch the desired attributes. Or, if > you're targeting pre-10.6 then FSGetCatalogInfoBulk().
You don't need to drop down to CFURLEnumerator for that. You can use -[NSFileManager enumeratorAtURL:includingPropertiesForKeys:options:errorHandler:]. Unsurprisingly, the array of property keys asks it to prefetch the desired properties. Each object returned by the enumerator is an NSURL and you get its properties using -getResourceValue:forKey:error:. These are the properties which have been prefetched. Of course, you then have to switch to using the Cocoa property keys rather than the old-style File Manager properties. NSFileType -> NSURLFileResourceTypeKey isFilePackageAtPath -> NSURLIsPackageKey kLSItemInfoIsInvisible -> NSURLIsHiddenKey kFSNodeLockedMask -> either NSURLIsUserImmutableKey or NSURLIsSystemImmutableKey is TRUE kFSCatInfoCreateDate -> NSURLCreationDateKey kFSCatInfoContentMod -> NSURLContentModificationDateKey kFSCatInfoBackupDate -> no translation, as far as I know kFSCatInfoAccessDate -> NSURLContentAccessDateKey If you absolutely must have the backup date, rather than dropping back to the old File Manager API, I would recommend using the getdirentriesattr() function. It may support the ATTR_CMN_BKUPTIME attribute if the volume and the file system driver support it: https://developer.apple.com/library/mac/documentation/darwin/Reference/ManPages/man2/getdirentries.2.html All of that said, there's no guarantee that remote file system access is ever going to be especially speedy. Regards, Ken _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
