When you bring up the derived addresses in the bip39 page. Get it to show many addresses (I did 500). Then search the page for the public keys from the unspent output list and only sweep the private keys related to that. That way you don't have to sweep every key to find out if there is a balance.
This saves considerable amount of time. For some reason I had few that didn't show up even with 500 keys. Not sure why.
maybe someone can help.... i have extracted already 160.000 private keys from my 12 word seed (Multibit hd) with bip39-standalone tool - but i dont know which one really containes some balance.
how do you get information of which key conatins balance ?
i import the keys via batch bitcoin-cli. on this way i can add about 35000 keys a day to my wallet.
but the outcome from the previous 160.000 keys was 0 !
over all i am not sure if this is the right way - when i add the 12 word seed to electroncash restore, i get wrong balance. my last two BTC payment are now on BCC factor 100 greater than before in BTC. (Payment of -0.01BTC befor 01/08/2017 appears after restore in BCC as -1.00BCC)