Performing the following (note the range of 10,000):

`importmulti '[{"desc": "sh(wpkh([aeee1e6a/49h/1h/0h]tpubDC5bVdaveQYxGFztMShFAjU637kKjrs9FD8ne1oHR7z8tLeQJExsaxWRVeSpcCcYMdp5ecf2LQhuVaeYFZ7YEpvWTJr4nDGUJrmuvLuTSsp/1/*))", "keypool": true, "timestamp": "now", "watchonly": true, "internal": true, "range": {"end": 1000}}]' '{"rescan": false}'`

takes many minutes. @achow101 reports a similar import taking 6 minutes on his machine.
{
    m_chain_notifications_handler = m_chain->handleNotifications(*this);
}
void CWallet::postInitProcess()
{
    auto locked_chain = chain().lock();
    LOCK(cs_wallet);
    
    
    ReacceptWalletTransactions(*locked_chain);
    
    chain().requestMempoolTransactions(*this);
}
bool CWallet::BackupWallet(const std::string& strDest)