Progression Handler: Slow Down Progress Reporting

Usage

handler_slowdown(
  duration = 10,
  intrusiveness = 0,
  target = "void",
  enable = getOption("progressr.enable", TRUE),
  ...
)

duration: (numeric) Added slowdown (in seconds) across all progress steps, e.g. if duration = 10.0 and steps = 100L, then each step unit is delayed 0.1 seconds, totaling a ten-second slowdown.
intrusiveness: (numeric) A non-negative scalar on how intrusive (disruptive) the reporter to the user.
target: (character vector) Specifies where progression updates are rendered.
enable: (logical) If FALSE, then progress is not reported.
...: Additional arguments passed to make_progression_handler().

This progression handler delays each progress step a certain number of seconds. It does not render any output.

if (FALSE) { # \dontrun{
handlers(handler_slowdown(duration = 30.0)) ## 30-second total slowdown
with_progress(y <- slow_sum(1:100))
print(y)
} # }