Absolute seeks (forward) are (nearly twice) faster than relative seeks from the current position. (Maybe it has to do a tell to find out the current position before relative seeks?)

Backward seeks from the end are 3 times slower than forward seeks. 

open O, '+<:raw', '1GBx8.bin' or die $!;;

seek O, 0, 0; $t=time; seek O, $_*1000, 0 for 0 .. 8589934; print time
+-$t;;
7.61572408676147

seek O, 0, 0; $t=time; seek O, 1000, 1 for 0 .. 8589934; print time-$t
+;;
11.6447620391846

seek O, 0, 2; $t=time; seek O, -1000, 1 for 0 .. 8589934; print time-$
+t;;
11.6476919651031

seek O, 0, 2; $t=time; seek O, $_*-1000, 2 for 0 .. 8589934; print tim
+e-$t;;
23.074695110321

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In reply to Re: How smart is 'seek $fh, $pos, 0'? by BrowserUk
in thread How smart is 'seek $fh, $pos, 0'? by Monk::Thomas

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