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Things I want, in order

• Time-based benchmarking - duh
  • Nesting
  • Manual and closure
• Output of benchmark results in plaintext to stdout
• Global configuration
  • off/on, output location, output format, metric
• getrusage()-based metrics?
• Output to files
• Basic statistics(Mean/Mode and such)
• Different output formats(HTML,JSON)
• Ability to POST output
• Configure statistics to output
• Better statistics, plots, images, etc

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Sample uses(in the future):

<?php
$config = array('enabled' => true, 'output' => 'stdout', 'format' => 'plain', 'verbose' => true);
Benchmark::configure($config);
//Benchmark a function
Benchmark::bench('Foreach', function() { foreach(array(1,2,3) as $i) { $s = "${i}"; } });

//Benchmark a function 100 times
Benchmark::bench('Foreach', function() { foreach(array(1,2,3) as $i) { $s = "${i}"; } }, 100);

//Benchmark a function 100 times manually
for($i = 0; $i < 100; $i++) {
    Benchmark::start('Array Map');
    array_walk(array(1,2,3),function($i) { $s = "${i}"; });
    Benchmark::stop();
}
echo "For example: ".Benchmark::time('Foreach')."\n";
echo "Or maybe: ".Benchmark::avg('Foreach')."\n";
Benchmark::done();

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Sample output(to start):

For example: 0.000001
Or maybe: 0.000001
Foreach: 
1.       0.000001
2.       0.000002
3.       0.000001
...
101.     0.000002
Average: 0.000001
Array map:
1.       0.000001
...
100.     0.000003
Average: 0.000002

I dunno, something like that. It should always be simple enough to use in phpsh.

When disabled, Benchmark::stop(), Benchmark::stop(), Benchmark::done(), etc will do nothing. Benchmark::time() will return 0. Benchmark::bench() will execute its callback once with no timing - ideally this can be left in scripts and turned on for testing and turned off for real usage