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require 'benchmark'
require 'time'
#
# this is all here in case this example is run from the examples directory
#
begin
require 'hitimes'
rescue LoadError => le
ext_path = File.expand_path( File.join( File.dirname( __FILE__ ), "..", "ext" ) )
lib_path = File.expand_path( File.join( File.dirname( __FILE__ ), "..", "lib" ) )
if $:.include?( ext_path ) then
raise le
end
$: << ext_path
$: << lib_path
retry
end
#----------------------------------------------------------------------
# test program to look at the performance sampling time durations using
# different methods
#----------------------------------------------------------------------
include Benchmark
#
# Normal apprach to Interval usage
#
def hitimes_duration_i1
i = Hitimes::Interval.new
i.start
i.stop
end
#
# Use the easy access method to start stop an interval
#
def hitimes_duration_i2
Hitimes::Interval.now.stop
end
#
# Use a new timer each time
#
def hitimes_duration_t1
Hitimes::TimedMetric.now('duration_t1').stop
end
#
# reuse the same timer over and over
#
HT2= Hitimes::TimedMetric.new( 'duration_t2' )
def hitimes_duration_t2
HT2.start
HT2.stop
end
HT3 = Hitimes::TimedMetric.new( 'duration_t3' )
def hitimes_duration_t3
HT3.measure { nil }
end
#
# Check out the speed of the TimedValueMetric too
#
def hitimes_duration_tv1
Hitimes::TimedValueMetric.now( 'duration_tv1' ).stop( 42 )
end
HTV2 = Hitimes::TimedValueMetric.new( 'duration_tv2' )
def hitimes_duration_tv2
HTV2.start
HTV2.stop( 42 )
end
HTV3 = Hitimes::TimedValueMetric.new( 'duration_tv3' )
def hitimes_duration_tv3
HTV3.measure( 42 ) { nil }
end
#
# use the Struct::Tms values and return the difference in User time between 2
# successive calls
#
def process_duration
t1 = Process.times.utime
Process.times.utime - t1
end
#
# Take 2 times and subtract one from the other
#
def time_duration
t1 = Time.now.to_f
Time.now.to_f - t1
end
puts "Testing time sampling 100,000 times"
bm(30) do |x|
x.report("Process") { 100_000.times { process_duration } }
x.report("Time") { 100_000.times { time_duration } }
x.report("Hitimes::TimedMetric 1") { 100_000.times { hitimes_duration_t1 } }
x.report("Hitimes::TimedMetric 2") { 100_000.times { hitimes_duration_t2 } }
x.report("Hitimes::TimedMetric 3") { 100_000.times { hitimes_duration_t3 } }
x.report("Hitimes::Interval 1") { 100_000.times { hitimes_duration_i1 } }
x.report("Hitimes::Interval 2") { 100_000.times { hitimes_duration_i2 } }
x.report("Hitimes::TimedValueMetric 1") { 100_000.times { hitimes_duration_tv1 } }
x.report("Hitimes::TimedValueMetric 2") { 100_000.times { hitimes_duration_tv2 } }
x.report("Hitimes::TimedValueMetric 3") { 100_000.times { hitimes_duration_tv3 } }
end
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