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.
{
        READWRITE(this->nVersion);
        READWRITE(nExternalChainCounter);
        READWRITE(seed_id);
        if (this->nVersion >= VERSION_HD_CHAIN_SPLIT)
            READWRITE(nInternalChainCounter);
    }
    void SetNull()
    {
        nVersion = CHDChain::CURRENT_VERSION;
        nExternalChainCounter = 0;
        nInternalChainCounter = 0;
        seed_id.SetNull();
    }
};
class CKeyMetadata
{
public:
    static const int VERSION_BASIC=1;
    static const int VERSION_WITH_HDDATA=10;
    static const int VERSION_WITH_KEY_ORIGIN = 12;
    static const int CURRENT_VERSION=VERSION_WITH_KEY_ORIGIN;
    int nVersion;
    int64_t nCreateTime; 
    std::string hdKeypath; 
    CKeyID hd_seed_id; 
    KeyOriginInfo key_origin; 
    bool has_key_origin = false; 
    CKeyMetadata()