if (sid != null)
((ExecutionCtrl)exec).setRequestId(sid);
final AuWriter out = AuWriters.newInstance();
out.setCompress(_compress);
out.open(request, response,
desktop.getDevice().isSupported(Device.RESEND) ?
getProcessTimeout(config.getResendDelay()): 0);
//Note: getResendDelay() might return nonpositive
try {
wappc.getUiEngine().execUpdate(exec, aureqs, out);