Misc::Stopwatch - Measure elapsed time
#!/usr/bin/perl use Misc::Stopwatch; my $sw = Misc::Stopwatch->new()->start(); for (1 .. 3) { sleep 1; $sw->lap(); } $sw->stop(); printf "Lap 1: %f\n", $sw->elapsed(1); printf "Lap 2: %f\n", $sw->elapsed(2); printf "Lap 3: %f\n", $sw->elapsed(3); printf "Total: %f\n", $sw->elapsed();
Will output something like:
Lap 1: 1.000244 Lap 2: 2.000375 Lap 3: 3.000527 Total: 3.000544
Nothing exported by default
This module requires these other modules and libraries:
Time::HiRes
This module provides convenient methods as expected from a stopwatch.
start Starts the stopwatch lap Marks a lap time stop Stops it elapsed Returns the elapsed time reset Stops if running and clears all laps is_running True or False
Similar modules:
Time::Stopwatch - provides a tied interface and will work without Time::HiRes.
Time::Stopwatch
Benchmark::Stopwatch - is mostly identical, however does not have the elapsed method.
Benchmark::Stopwatch
elapsed
This example will not abort:
use Misc::Stopwatch;
This example will return true:
my $sw = Misc::Stopwatch->new();
Returns $self.
$self
Note that calling this on an already-running instance will reset it.
my $sw = Misc::Stopwatch->new()->start();
This is is a no-op unless the stopwatch is running.
my $sw = Misc::Stopwatch->new()->start()->lap();
my $sw = Misc::Stopwatch->new()->start()->stop();
In its second form, elapsed will return the time from "start" to now (or when "stop" was called).
undefined is returned when:
undefined
1.) $lap is provided but no such lap exists
$lap
2.) "is_running" returns a false value
Misc::Stopwatch->new()->start()->elapsed();
my $sw = Misc::Stopwatch->new()->reset();
Returns a true value if the stopwatch has been started and has not been stopped.
This example will return false:
Misc::Stopwatch->new()->is_running();
Misc::Stopwatch->new()->start()->is_running();
Ryan Gies <ryangies@cpan.org>
Copyright (C) 2014-2016 by Ryan Gies. All rights reserved. Copyright (C) 2006-2013 by Livesite Networks, LLC. All rights reserved. Copyright (C) 2000-2005 by Ryan Gies. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. * Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. * The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. To the best of our knowledge, no patented algorithms have been used. However, we do not have the resources to carry out a patent search, and therefore cannot give any guarantee of the above statement.
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