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.
{
        SetNull();
    }
    explicit CKeyMetadata(int64_t nCreateTime_)
    {
        SetNull();
        nCreateTime = nCreateTime_;
    }
    ADD_SERIALIZE_METHODS;
    template <typename Stream, typename Operation>
    inline void SerializationOp(Stream& s, Operation ser_action) {
        READWRITE(this->nVersion);
        READWRITE(nCreateTime);
        if (this->nVersion >= VERSION_WITH_HDDATA)
        {
            READWRITE(hdKeypath);
            READWRITE(hd_seed_id);
        }
        if (this->nVersion >= VERSION_WITH_KEY_ORIGIN)
        {
            READWRITE(key_origin);
            READWRITE(has_key_origin);
        }
    }
    void SetNull()