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u"r Improved |
initial writing: 2000-00-00 |
The rank operator u"r for a general verb u
is now more efficient in the use of temporary arrays,
resulting in improved performance in time (slightly) and in space.
In the time and space comparisons presented below,
the result of 7!:3 is a 2-column table of
block sizes and the number of available temps of that size.
ts=: 6!:2 , 7!:2@] pi =: 3 : 'o.y.' plus=: 4 : 'x.+y.' x=: o.?1e5$1e6 y=: o.?1e5$1e6 J 4.05 J 4.04 7!:3 7!:3 64 1207 64 1097 128 1130 128 1109 256 255 256 277 512 84 512 84 1024 45 1024 44 ts 'pi"0 y' ts 'pi"0 y' 5.02835 1.05498e6 5.16796 1.4836e7 7!:3 7!:3 64 1207 64 100425 128 1130 128 1109 256 255 256 277 512 84 512 84 1024 45 1024 556 ts 'x plus"0 y' ts 'x plus"0 y' 5.45015 1.0553e6 5.5558 8.48902e6 7!:3 7!:3 64 1207 64 100425 128 1130 128 1109 256 255 256 277 512 84 512 84 1024 45 1024 556