[Bioc-devel] make check timing

The current guideline is that it cannot take more than 5 minutes to
run R CMD check.  It looks as if R-2.14 first run all R code in the
vignettes and then builds the vignette (!!).  This implies that the
total time for R CMD check includes 2x time it takes to build
vignette.   How is this handled wrt 5 minute limit?

Kasper