stepcompress: Favor higher add values when bisecting
Instead of splitting the available "add range" in half, try for add values closer to the higher end of the range. This heuristic seems to result in better choices. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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@ -202,7 +202,7 @@ compress_bisect_add(struct stepcompress *sc)
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// Bisect valid add range and try again with new 'add'
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if (minadd > maxadd)
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break;
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add = (minadd + maxadd) / 2;
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add = maxadd - (maxadd - minadd) / 4;
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}
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return (struct step_move){ bestinterval, bestcount, bestadd };
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}
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