gets.rb

require 'augeas'

Augeas.open(nil, nil, Augeas::NO_MODL_AUTOLOAD) do |aug|
  aug.transform(
    :name => 'NagiosObjects',
    :lens => 'NagiosObjects.lns',
    :incl => ['/home/rpinson/bas/augeas/etc/nagios.d/*.cfg'],
    :excl => []
  )
  aug.load!

  for i in 1..1000
    p aug.get("/files/home/rpinson/bas/augeas/etc/nagios.d/service-test-#{i}.cfg/service/use")
  end
end

output

> \time -v ruby gets.rb 
	Command being timed: "ruby gets.rb"
	User time (seconds): 0.34
	System time (seconds): 0.04
	Percent of CPU this job got: 99%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 0:00.39
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 11932
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 0
	Minor (reclaiming a frame) page faults: 3111
	Voluntary context switches: 3
	Involuntary context switches: 182
	Swaps: 0
	File system inputs: 0
	File system outputs: 0
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0