解决PS打开文件太卡的问题

function deleteDocumentAncestorsMetadata() {
  //String version of the app name
  whatApp = String(app.name);
  // Check for photoshop specifically, or this will cause errors
  if(whatApp.search("Photoshop") > 0) {
    // Function Scrubs Document Ancestors from Files
    if(!documents.length) {
      alert("There are no open documents. Please open a file to run this script.")
      return;
    }
    if (ExternalObject.AdobeXMPScript == undefined) ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
    var xmp = new XMPMeta( activeDocument.xmpMetadata.rawData);
    // Begone foul Document Ancestors!
    xmp.deleteProperty(XMPConst.NS_PHOTOSHOP, "DocumentAncestors");
    app.activeDocument.xmpMetadata.rawData = xmp.serialize();
  }
}
// Now run the function to remove the document ancestors
deleteDocumentAncestorsMetadata();