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Download Launch Time Performance Guidelines (Legacy)
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Minimizing File Access At Launch Time Using fs_usage to Review File I/O 11:00:04 getdirentries 0.000005 TextEdit 11:00:04 close 0.000007 TextEdit The preceding sample data shows how much time was spent getting information about the TextEdit binary file and its document window nib file. In this example, most of the operations took only microseconds to perform. You should search your own output to see if there are any files being accessed that aren’t really needed, or whose access takes a significant amount of time. Retired Document | 2014-03-10 | Copyright © 2003, 2014 Apple Inc. All Rights Reserved. 16
