You, stubborn boyz, don't get simple thing: bounty is 100% compressed, so you need only -c switch.
For abandoned wallets you 100% need both -u and -c switches.
That's 2x drop.
bloom filter with thousands of addressed also cannot be free. Here you get another ~50% drop.
So, 1 address vs thousands is really around "3X difference".
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Thanks.
One more thing, about -b -t -p (to Zielar)
Default setting:
~/BitCrack/bin$ ./clBitCrack -d 1 15VF3MsCzjHmFQ3wK3SMrTEBTmFY8zhJnU
Ellesmere 16/6471MB | 1 target 48.35 MKey/s (1,997,537,280 total) [00:00:39]
My setting:
:~/BitCrack/bin$ ./clBitCrack -d 1 -b 72 -t 256 -p 2048 15VF3MsCzjHmFQ3wK3SMrTEBTmFY8zhJnU
Ellesmere 2304/6491MB | 1 target 107.70 MKey/s (868,220,928 total) [00:00:06]
racminer - I know that multiplying the value of -b x2 does not affect the result, however I found (in my case) on other cards - a setting that is definitely better. And without hiding the fact that the -p indicator I have exactly the same as you (2560), check what result will be at the setting: -b 36 -t 512 -p 2560 ... if it does not move, reduce the -p value... and share the result... :-)