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.
{
    LOCK(cs_wallets);
    for (const std::shared_ptr<CWallet>& wallet : vpwallets) {
        if (wallet->GetName() == name) return wallet;
    }
    return nullptr;
}
static Mutex g_wallet_release_mutex;
static std::condition_variable g_wallet_release_cv;
static std::set<CWallet*> g_unloading_wallet_set;
static void ReleaseWallet(CWallet* wallet)
{
    
    
    wallet->WalletLogPrintf("Releasing wallet\n");
    wallet->BlockUntilSyncedToCurrentChain();
    wallet->Flush();
    wallet->m_chain_notifications_handler.reset();
    delete wallet;
    
    {
        LOCK(g_wallet_release_mutex);
        if (g_unloading_wallet_set.erase(wallet) == 0) {
            
            return;
        }
    }
    g_wallet_release_cv.notify_all();
}
void UnloadWallet(std::shared_ptr<CWallet>&& wallet)