Displaying 4 results from an estimated 4 matches for "ppff".
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2018 Aug 12
2
Package compiler - efficiency problem
Dear R team,
I am a co-author and maintainer of one of R packages distributed by R-forge
(gEcon). One of gEcon package users found a strange behaviour of package (R
froze for couple of minutes) and reported it to me. I traced the strange
behaviour to compiler package. I attach short demonstration of the problem
to this mail (demonstration makes use of compiler and tictoc packages only).
In
2018 Aug 16
3
Package compiler - efficiency problem
...more information than the compiler -
> it could be turned into an interpreter of these functions and compute their
> values on the fly.
>
> A significant source of inefficiency of the generated code are
> element-wise operations, such as
>
> r[12] <- -vv[88] + vv[16] * (1 + ppff[1307])
> ...
>
> r[139] <- -vv[215] + vv[47] * (1 + ppff[1434])
>
> (these could be vectorized, which would reduce code size and improve
> interpretation speed; and make it somewhat readable). Most of the code
> lines in the generated functions seem to be easily vectorizable...
2018 Aug 13
0
Package compiler - efficiency problem
...or of these functions has much more
information than the compiler - it could be turned into an interpreter
of these functions and compute their values on the fly.
A significant source of inefficiency of the generated code are
element-wise operations, such as
r[12] <- -vv[88] + vv[16] * (1 + ppff[1307])
...
r[139] <- -vv[215] + vv[47] * (1 + ppff[1434])
(these could be vectorized, which would reduce code size and improve
interpretation speed; and make it somewhat readable). Most of the code
lines in the generated functions seem to be easily vectorizable.
Compilers and interpreters n...
2018 Aug 17
0
Package compiler - efficiency problem
...an the compiler - it
> could be turned into an interpreter of these functions and compute
> their values on the fly.
>
> A significant source of inefficiency of the generated code are
> element-wise operations, such as
>
> r[12] <- -vv[88] + vv[16] * (1 + ppff[1307])
> ...
>
> r[139] <- -vv[215] + vv[47] * (1 + ppff[1434])
>
> (these could be vectorized, which would reduce code size and
> improve interpretation speed; and make it somewhat readable). Most
> of the code lines in the generated functions seem to be...