<?php
define( "ITERATIONS", 1000000 );
define( "RUNS", 10 );
printf( "RUNS: %d, ITERATIONS: %d\n", RUNS, ITERATIONS );

class ClassA {

	public $mConn;
	public $mOpened;

	function isOpen() {
		return $this->mOpened;
	}

	function funcAssert() {
		assert( '$this->isOpen() && $this->mConn' );
		$this->mConn++;     
	}
	
	function funcIfGuard() {
		if ( ! ( $this->isOpen() && $this->mConn ) ) {
			throw new ErrorException( '($this->isOpen() && $this->mConn) does not hold' );
		}
		$this->mConn++;     
	}
	
	function testAssert()
	{
		for ($i = 1; $i <= ITERATIONS; $i++) {
			$this->funcAssert();
		}
	}

	function testIfGuard()
	{
		for ($i = 1; $i <= ITERATIONS; $i++) {
			$this->funcIfGuard();
		}
	}
}

assert_options( ASSERT_ACTIVE, 0 );
$obj=new ClassA();

$assertTotal=0;
$ifGuardTotal=0;

for ( $j=0; $j < RUNS ; $j++ ) {		

	$obj->mOpened=true;
	$obj->mConn=2;
	$before=microtime(true);
	$obj->testAssert();
	$after=microtime(true);
	printf("%10s: %04.3f\n", "assert", ($after-$before) );
	$assertTotal+=($after-$before);

	$obj->mOpened=true;
	$obj->mConn=2;
	$before=microtime(true);
	$obj->testIfGuard();
	$after=microtime(true);
	printf("%10s: %04.3f\n", "ifGuard", ($after-$before) );
	$ifGuardTotal+=($after-$before);
}

printf("total: %10s: %03.3f\n", "assert", $assertTotal);
printf("total: %10s: %03.3f\n", "ifGuard", $ifGuardTotal);
printf("assert is ~%d%% faster than ifGuard\n", (1-($assertTotal/$ifGuardTotal))*100 );