Quick require debug

quick-require-debug.rb

$require_indent = 0
$require_times = []
$require_abs_start = Time.now.to_f

def putz(*args, &blk)
  puts(*args, &blk)
end

module Kernel
  alias_method :old_require, :require
  def require(*args)
    t1 = Time.now.to_f
    
    indent_marker = "-- " * $require_indent
    putz "#{"%10.6f" % (t1 - $require_abs_start)} #{indent_marker}#{args.inspect}"

    $require_indent += 1
    old_require(*args)
  ensure
    $require_indent -= 1

    t2 = Time.now.to_f
    tt = t2 - t1
    $require_times << [tt, args] if $require_indent == 1
    
    importance_marker = "<---" * (tt / 0.1)
    putz "#{"%10.6f" % (t2 - $require_abs_start)} #{indent_marker}Done in #{tt} for #{args.inspect} #{importance_marker}"
  end
end

# ...

putz "Slowest requires:"

slowest_tt = 0
$require_times.sort_by { |v| -v[0] }.each do |(tt, args)|
  putz "#{"%10.6f" % tt} Done in #{tt} for #{args}"
  slowest_tt += tt
  break if tt < 0.02
end

putz "Slowest total: #{slowest_tt}\n\n"