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.
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid redeem script \"" + strRedeemScript + "\": must be hex string");
        }
        auto parsed_redeemscript = ParseHex(strRedeemScript);
        import_data.redeemscript = MakeUnique<CScript>(parsed_redeemscript.begin(), parsed_redeemscript.end());
    }
    if (witness_script_hex.size()) {
        if (!IsHex(witness_script_hex)) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid witness script \"" + witness_script_hex + "\": must be hex string");
        }
        auto parsed_witnessscript = ParseHex(witness_script_hex);
        import_data.witnessscript = MakeUnique<CScript>(parsed_witnessscript.begin(), parsed_witnessscript.end());
    }
    for (size_t i = 0; i < pubKeys.size(); ++i) {
        const auto& str = pubKeys[i].get_str();
        if (!IsHex(str)) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Pubkey \"" + str + "\" must be a hex string");
        }
        auto parsed_pubkey = ParseHex(str);
        CPubKey pubkey(parsed_pubkey.begin(), parsed_pubkey.end());
        if (!pubkey.IsFullyValid()) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Pubkey \"" + str + "\" is not a valid public key");
        }
        pubkey_map.emplace(pubkey.GetID(), pubkey);
        ordered_pubkeys.push_back(pubkey.GetID());
    }
    for (size_t i = 0; i < keys.size(); ++i) {
        const auto& str = keys[i].get_str();
        CKey key = DecodeSecret(str);
        if (!key.IsValid()) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key encoding");