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 (!AddToWalletIfInvolvingMe(ptx, block_hash, posInBlock, update_tx))
        return; 
    
    
    
    MarkInputsDirty(ptx);
}
void CWallet::TransactionAddedToMempool(const CTransactionRef& ptx) {
    auto locked_chain = chain().lock();
    LOCK(cs_wallet);
    SyncTransaction(ptx, {} , 0 );
    auto it = mapWallet.find(ptx->GetHash());
    if (it != mapWallet.end()) {
        it->second.fInMempool = true;
    }
}
void CWallet::TransactionRemovedFromMempool(const CTransactionRef &ptx) {