Windows 10 parallelization can be super slow #94

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1. jgabry commented on Jan 3, 2019

   

   jgabry

   on Jan 3, 2019

   Member

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   We could mention this in the package documentation, but if this is very severe then maybe it's worth printing a message about it to Windows users when the package is loaded?
   I'm not sure what the message would be precisely, but it's possible by adding to the .onAttach() function. Currently it's this:

   loo/R/zzz.R

   Lines 1 to 10 in e147fd3

   	.onAttach <- function(...) {
   	ver <- utils::packageVersion("loo")
   	packageStartupMessage(
   	"This is loo version ", ver, ".\n",
   	"**NOTE: As of version 2.0.0 loo defaults to 1 core ",
   	"but we recommend using as many as possible. ",
   	"Use the 'cores' argument or set options(mc.cores = NUM_CORES) for an entire session. ",
   	"Visit mc-stan.org/loo/news for details on other changes."
   	)
   	}
2. avehtari

   added a commit that references this issue on Feb 3, 2019

   add warning about Windows 10 core problem #94

   6698455
3. jgabry

   added a commit that references this issue on Feb 27, 2019

   Merge pull request #99 from stan-dev/add-a-warning-issue-94

   ...

   eeaf33d
4. avehtari

   closed this as completedon Mar 14, 2019