Nosing around in cu.c I find
static DF1(jtundco1){DECLFG; R df1( w,atop(inv(gs),ampco(fs,gs)));}
This is the routine that executes on the verb derived from u&.:v .
What I don't understand is why the calculation of the inverse and &: and
@ are not performed before the derived verb is created. That result
could be stored in h, which would shorten this code to
static DF1(jtundco1){DECLFGH; R df1( w,hs);}
As it is, the inverse calculation etc are performed every time the verb
is executed on data.
Can anyone show cause why this calculation should not be performed
during the execution of &.: rather than in the derived verb?
Henry
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