R version 4.5.0 RC (2025-04-04 r88126 ucrt) -- "How About a Twenty-Six"
Copyright (C) 2025 The R Foundation for Statistical Computing
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\2025_04_10_06_25_16_20464\Rtmp29WeGH\file32fc4d204214.R"
Unit: microseconds
       expr      min       lq       mean   median       uq      max neval
 first time 1454.602 1454.602 1454.60200 1454.602 1454.602 1454.602     1
 subsequent   17.300   17.701   18.63503   17.901   18.251   73.100   100

> source(FILE.R, chdir = FALSE)
Unit: microseconds
       expr     min      lq      mean  median      uq     max neval
 first time 717.001 717.001 717.00100 717.001 717.001 717.001     1
 subsequent  16.501  17.101  17.80309  17.201  17.401  68.101   100

> source(FILE.R, chdir = TRUE)
Unit: microseconds
       expr     min      lq      mean   median      uq     max neval
 first time 390.801 390.801 390.80100 390.8010 390.801 390.801     1
 subsequent  17.502  20.102  21.44806  20.8515  21.651  67.601   100
> 
> proc.time()
   user  system elapsed 
   0.39    0.07    0.90