Parallel chunk Runing

rmarkdown
rstudio

#1

Is it possible to knit an Rmarkdown document( html, pdf, ...) with several chunks calling another .Rmd codes and run in parallel to spend less time?
for example if I have:
```{r child = 'Part1.Rmd'}
## This chunk executes Part1.Rmd document and add the results to the output
```
```{r child = 'Part2.Rmd'}
## This chunk executes Part2.Rmd document and add the results to the output
```
I want to execute the two chunks in parallel. is it possible?