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.
if (rescan_height != block_height) {
                chain.initError(_("Prune: last wallet synchronisation goes beyond pruned data. You need to -reindex (download the whole blockchain again in case of pruned node)"));
                return nullptr;
            }
        }
        chain.initMessage(_("Rescanning..."));
        walletInstance->WalletLogPrintf("Rescanning last %i blocks (from block %i)...\n", *tip_height - rescan_height, rescan_height);
        
        
        if (walletInstance->nTimeFirstKey) {
            if (Optional<int> first_block = locked_chain->findFirstBlockWithTimeAndHeight(walletInstance->nTimeFirstKey - TIMESTAMP_WINDOW, rescan_height, nullptr)) {
                rescan_height = *first_block;
            }
        }
        nStart = GetTimeMillis();
        {
            WalletRescanReserver reserver(walletInstance.get());
            if (!reserver.reserve() || (ScanResult::SUCCESS != walletInstance->ScanForWalletTransactions(locked_chain->getBlockHash(rescan_height), {} , reserver, true ).status)) {
                chain.initError(_("Failed to rescan the wallet during initialization"));
                return nullptr;
            }
        }
        walletInstance->WalletLogPrintf("Rescan completed in %15dms\n", GetTimeMillis() - nStart);
        walletInstance->ChainStateFlushed(locked_chain->getTipLocator());
        walletInstance->database->IncrementUpdateCounter();
        
        if (gArgs.GetBoolArg("-zapwallettxes", false) && gArgs.GetArg("-zapwallettxes", "1") != "2")
        {
            WalletBatch batch(*walletInstance->database);
            for (const CWalletTx& wtxOld : vWtx)