bench::mark未返回mean和max运行时长，与帮助文档不符求解答

Hey there! Let me help you figure out why you're not seeing mean and max in your bench::mark() results.

The issue boils down to the version of the bench package you're using (1.0.4) being an older release. Back in this version, the default output of bench::mark() only included metrics like min, median, itr/sec, etc.—mean and max weren't part of the default result columns.

But don't worry, you have two solid ways to get those values:

• Calculate them manually from raw time data: The time column in your result object holds all individual run times from the benchmark. You can compute mean and max directly from it:

  # Get mean run time
  mean(res$time)
  # Get max run time
  max(res$time)
  

• Upgrade the bench package: If you update to a newer version (2.0.0 or later), bench::mark() will include mean and max in the default output automatically. You can even customize which metrics show up using the summary parameter:

  # In newer versions, specify exactly which stats you want
  res <- bench::mark(rnorm(1e5), summary = c("min", "median", "mean", "max"))
  names(res)
  

The reason this feels conflicting with the help docs is probably because you're looking at documentation for a newer version of bench—the docs were updated to reflect the expanded default metrics in later releases.

内容的提问来源于stack exchange，提问作者Sebastian