Parallel chunk Runing

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?

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