require 'benchmark'

# Benchmarks for various File operations.
#
#                                user     system      total        real
# expand_path .              0.050000   0.120000   0.170000 (  0.183515)
# expand_path ./../dir       0.040000   0.110000   0.150000 (  0.160149)
# expand_path ~              0.010000   0.000000   0.010000 (  0.008848)
# expand_path ~/../dir       0.010000   0.000000   0.010000 (  0.009907)
# expand_path /              0.010000   0.000000   0.010000 (  0.009150)
# expand_path /path/to/dir   0.010000   0.000000   0.010000 (  0.009634)
#
Benchmark.bm(25) do |x|

  n = 10000

  x.report "expand_path ." do
    n.times { File.expand_path(".") }
  end

  x.report "expand_path ./../dir" do
    n.times { File.expand_path("./../dir") }
  end

  x.report "expand_path ~" do
    n.times { File.expand_path("~") }
  end

  x.report "expand_path ~/../dir" do
    n.times { File.expand_path("~/../dir") }
  end

  x.report "expand_path /" do
    n.times { File.expand_path("/") }
  end

  x.report "expand_path /path/to/dir" do
    n.times { File.expand_path("/path/to/dir") }
  end
end