R Under development (unstable) (2024-12-15 r87442 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> local({
+     FILE.R <- tempfile(fileext = ".R")
+     on.exit(unlink(FILE.R), add = TRUE)
+     this.path:::.writeCode(file = FILE.R, {
+         if (requireNamespace("microbenchmark", quietly = TRUE)) {
+             print(this.path:::.faster_subsequent_times_test())
+         } else cat("\n'package:microbenchmark' is not available :(\n")
+     })
+     cat("\n")
+     this.path:::.Rscript(c("--default-packages=NULL", "--vanilla", FILE.R))
+ 
+ 
+     cat("\n> source(FILE.R, chdir = FALSE)\n")
+     source(FILE.R, chdir = FALSE)
+ 
+ 
+     cat("\n> source(FILE.R, chdir = TRUE)\n")
+     source(FILE.R, chdir = TRUE)
+ })

"D:/RCompile/recent/R/bin/x64/Rscript.exe" "--default-packages=NULL" "--vanilla" "D:\temp\2024_12_18_01_25_17_6972\Rtmp0gGbN8\file319d049fd27b8.R"
Unit: microseconds
       expr    min      lq     mean median     uq    max neval
 first time 1389.6 1389.60 1389.600 1389.6 1389.6 1389.6     1
 subsequent   16.1   19.35   21.689   19.8   20.2  181.1   100

> source(FILE.R, chdir = FALSE)
Unit: microseconds
       expr   min    lq    mean median    uq   max neval
 first time 726.3 726.3 726.300  726.3 726.3 726.3     1
 subsequent  20.9  22.1  22.627   22.4  22.7  43.5   100

> source(FILE.R, chdir = TRUE)
Unit: microseconds
       expr   min    lq    mean median    uq   max neval
 first time 392.8 392.8 392.800  392.8 392.8 392.8     1
 subsequent  11.1  11.2  11.662   11.2  11.3  46.7   100
> 
> proc.time()
   user  system elapsed 
   0.37    0.01    0.70