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.
{
    int64_t nNow = GetTime();
    assert(reserver.isReserved());
    uint256 block_hash = start_block;
    ScanResult result;
    WalletLogPrintf("Rescan started from block %s...\n", start_block.ToString());
    {
        fAbortRescan = false;
        ShowProgress(strprintf("%s " + _("Rescanning..."), GetDisplayName()), 0); 
        uint256 tip_hash;
        
        Optional<int> block_height = MakeOptional(false, int());
        double progress_begin;
        double progress_end;
        {
            auto locked_chain = chain().lock();
            if (Optional<int> tip_height = locked_chain->getHeight()) {
                tip_hash = locked_chain->getBlockHash(*tip_height);
            }
            block_height = locked_chain->getBlockHeight(block_hash);
            progress_begin = chain().guessVerificationProgress(block_hash);
            progress_end = chain().guessVerificationProgress(stop_block.IsNull() ? tip_hash : stop_block);
        }
        double progress_current = progress_begin;
        while (block_height && !fAbortRescan && !chain().shutdownRequested()) {