library(usethis) 

#R on MacOS Error: vector memory exhausted (limit reached?)
# usethis::edit_r_environ()
# R_MAX_VSIZE=100Gb




#https://stackoverflow.com/questions/51295402/r-on-macos-error-vector-memory-exhausted-limit-reached
gc()
##           used (Mb) gc trigger (Mb) max used (Mb)
## Ncells  611166 32.7    1281754 68.5  1069515 57.2
## Vcells 1067042  8.2    8388608 64.0  1876502 14.4