RStudio or not RStudio... that is the question!

RStudio is a very useful environment for development in R. However, running your script in RStudio can take much much more time than running the same in R. Let do an example with a progress bar.
Surprisingly R GUI is the fastest solution, second is RStudio and slowest is R in terminal.

 library("progress")

 In RStudio:
> system.time({
+     Total <- 50000
+     pb <- progress_bar$new(
+         format = "  completion [:bar] :percent eta: :eta",
+         total = Total, clear = FALSE)
+     for (annee in 1:Total) {
+         pb$tick()
+         Sys.sleep(0.0001)
+     }
+ })
  completion [========================================================================] 100% eta:  0s
utilisateur     système      écoulé 
     49.652       1.222     117.707 

In R GUI:
> system.time({
+   Total <- 50000
+   pb <- progress_bar$new(
+     format = "  completion [:bar] :percent eta: :eta",
+     total = Total, clear = FALSE)
+   for (annee in 1:Total) {
+     pb$tick()
+     Sys.sleep(0.0001)
+   }
+ })
  completion [================================================] 100% eta:  0sutilisateur     système      écoulé 
     45.570       0.856      53.106 

In R in terminal:
> system.time({
+   Total <- 50000
+   pb <- progress_bar$new(
+     format = "  completion [:bar] :percent eta: :eta",
+     total = Total, clear = FALSE)
+   for (annee in 1:Total) {
+     pb$tick()
+     Sys.sleep(0.0001)
+   }
+ })
  completion [=================================================] 100% eta:  0s
utilisateur     système      écoulé 

     45.764       0.783     121.449 

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