+/ and +⌿ Index   <<   >>

 
Eugene Ying, Dyalog Conference 2011, Boston
v←,y←1000 1000⍴0.1+⍳1000

+/+/y     18277
+/+⌿y      8178
+/,y       6445

expr           13.1      13.2    ratio
+/y          1.08e¯2   1.80e¯3    6.0
+⌿y          3.84e¯3   1.89e¯3    2.0
+/+/y        1.07e¯2   1.89e¯3    5.6  
+/+⌿y        3.85e¯3   1.89e¯3    2.0  
+/v          4.46e¯3   4.36e¯3    1.0


   +/ 2 3 ⍴ 4 1e50 ¯1e50
4 4
   +/       4 1e50 ¯1e50
0