Since this should be asynchronous, I'd be surprised if this is causing a significant performance degradation...

Thanks Shantonu! -- it was indeed updating the access time. Is there a supported way to prevent my process from updating the access time? My initial benchmarks show a 28% performance increase in processing 4000 photos (82 seconds before, 64 seconds after). David _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app... This email sent to site_archiver@lists.apple.com