Sure. Assuming that the U/BOLD/BLINK attributes are 0/1 and that you've already converted your colors into integers (0-255) and copied all of your attribute settings into scalars (which you won't really want to do, but it simplifies the example), I would use: 
$current_attribs = $as_bg + $as_fg << 8 + $as_u << 16 + $as_bold << 17
+ + $as_blink << 18;

[download]
This turns the full set of attributes into a 19-bit integer, allowing the CPU to compare two sets of attributes in a single operation when you check whether $current_attribs == $last_attribs. (They could be rendered into only 9 bits by taking the colors down into the 0-7 range (3 bits each instead of 8), but it would add a little time to do the conversion without saving any work later on.)

In reply to Re^3: Optimizing a Text Canvas: An inner loop and a cloner by dsheroh
in thread Optimizing a Text Canvas: An inner loop and a cloner by JosiahBryan

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