Created
August 7, 2014 00:42
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<?php | |
class Benchmark { | |
private $task_duration = 5; | |
private $tasks = []; | |
private $results = []; | |
private $duation = 0; | |
public function __construct() { | |
} | |
public function addTask(BenchmarkTask $task) { | |
$this->tasks[] = $task; | |
} | |
public function addTasks(array $tasks) { | |
foreach ($tasks as $task) { | |
$this->addTask($task); | |
} | |
} | |
public function getTasks() { | |
return $this->tasks; | |
} | |
public function getResults() { | |
return $this->results; | |
} | |
public function getDuration() { | |
return $this->duration; | |
} | |
public function run($task_duration = null) { | |
if (is_null($task_duration)) | |
$task_duration = $this->task_duration; | |
$run_start_time = microtime(true); | |
foreach ($this->tasks as $task) { | |
$closure = $task->getClosure(); | |
$task_start_microtime = microtime(true); | |
$task_start_time = time(); | |
$iterations = 0; | |
while ((time() - $task_start_time) < $task_duration) { | |
$closure(); | |
$iterations ++; | |
} | |
$duration = microtime(true) - $task_start_microtime; | |
$this->results[] = new BenchmarkResult($task, $duration, $iterations); | |
} | |
$this->duration = microtime(true) - $run_start_time; | |
} | |
public function __toString() { | |
$str = ''; | |
foreach ($this->results as $result) | |
$str .= $result . PHP_EOL . PHP_EOL; | |
$str .= 'Ran ' . count($this->tasks) . ' benchmarks in ' . $this->duration . ' seconds'; | |
return $str . PHP_EOL; | |
} | |
} | |
class BenchmarkTask { | |
private $closure; | |
private $reflection; | |
private $source; | |
private $name; | |
private $additionalDuration; | |
public function __construct($name, Closure $closure, $additionalDuration = 0) { | |
$this->closure = $closure; | |
$this->name = $name; | |
$this->additionalDuration = $additionalDuration; | |
$this->reflection = new ReflectionFunction($closure); | |
} | |
public function __toString() { | |
$str = 'function ('; | |
$params = array(); | |
foreach ($this->reflection->getParameters() as $p) { | |
$s = ''; | |
if ($p->isArray()) { | |
$s .= 'array '; | |
} | |
else if ($p->getClass()) { | |
$s .= $p->getClass()->name . ' '; | |
} | |
if ($p->isPassedByReference()) | |
$s .= '&'; | |
$s .= '$' . $p->name; | |
if ($p->isOptional()) | |
$s .= ' = ' . var_export($p->getDefaultValue(), true); | |
$params[]= $s; | |
} | |
$str .= implode(', ', $params); | |
$str .= ') {' . PHP_EOL; | |
$lines = file($this->reflection->getFileName()); | |
$tabs = strspn($lines[$this->reflection->getStartLine()], "\t"); | |
for($l = $this->reflection->getStartLine(); $l < $this->reflection->getEndLine(); $l++) { | |
$str .= substr($lines[$l], $tabs - 1); | |
} | |
return substr($str, 0, 1 + strrpos($str, '}')); | |
} | |
public function __invoke() { | |
return $this->reflection->invokeArgs(func_get_args()); | |
} | |
public function getName() { | |
return $this->name; | |
} | |
public function getClosure() { | |
return $this->closure; | |
} | |
public function getAdditionalDuration() { | |
return $this->additionalDuration; | |
} | |
} | |
class BenchmarkResult { | |
private $task; | |
private $duration; | |
private $iterations; | |
public function __construct(BenchmarkTask $task, $duration, $iterations) { | |
$this->task = $task; | |
$this->duration = $duration; | |
$this->iterations = $iterations; | |
} | |
public function getDuration() { | |
return $this->duration; | |
} | |
public function getIterations() { | |
return $this->iterations; | |
} | |
public function getTask() { | |
return $this->task; | |
} | |
public function __toString() { | |
$str = 'Benchmark result for ' . $this->task->getName() . PHP_EOL; | |
$str .= $this->task . PHP_EOL; | |
$str .= 'Executed ' . $this->getIterations() . ' iterations in ' . $this->getDuration() . ' (+ ' . $this->task->getAdditionalDuration() . ') seconds'; | |
return $str; | |
} | |
} |
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<?php | |
require('lib/Benchmark.php'); | |
$data = [ | |
'a,b,c,d,e,f,g,h', | |
'a ,b, c, d ,e, f, g, h' | |
]; | |
$start = microtime(true); | |
$data2 = array_map(function($a) {return preg_replace('/(\s+,|,\s+|\s+,\s+)/', ',', $a);}, $data); | |
$preg_replace = microtime(time) - $start; | |
$benchmark = new Benchmark(); | |
$benchmark->addTasks([ | |
new BenchmarkTask('preg_split', function() use ($data) { | |
foreach ($data as $dat) { | |
$a = preg_split('/\s*,\s*/', $dat); | |
} | |
}), | |
new BenchmarkTask('explode', function() use ($data) { | |
foreach ($data as $dat) { | |
$a = explode(',', $dat); | |
} | |
}), | |
new BenchmarkTask('explode, trim', function() use ($data) { | |
foreach ($data as $dat) { | |
$a = array_map('trim', explode(',', $dat)); | |
} | |
}), | |
new BenchmarkTask('preg_replace, explode', function() use ($data2) { | |
foreach ($data2 as $dat) { | |
$a = explode(',', $dat); | |
} | |
}, $preg_replace), | |
]); | |
$benchmark->run(); | |
print "$benchmark"; |
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