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- 06.01.2017
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BasePerformanceTest.php
001 <?php
002 /*
003 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
004 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
005 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
006 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
007 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
008 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
009 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
010 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
011 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
012 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
013 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
014 *
015 * This software consists of voluntary contributions made by many individuals
016 * and is licensed under the MIT license.
017 */
018
019 namespace ProxyManagerTest\Functional;
020
021 use PHPUnit_Framework_TestCase;
022
023 /**
024 * Base performance test logic
025 *
026 * @author Marco Pivetta <ocramius@gmail.com>
027 * @license MIT
028 *
029 * @group Performance
030 * @coversNothing
031 */
032 abstract class BasePerformanceTest extends PHPUnit_Framework_TestCase
033 {
034 /**
035 * @var float time when last capture was started
036 */
037 private $startTime = 0;
038
039 /**
040 * @var int bytes when last capture was started
041 */
042 private $startMemory = 0;
043
044 /**
045 * {@inheritDoc}
046 */
047 public static function setUpBeforeClass()
048 {
049 $header = "Performance test - " . get_called_class() . ":";
050
051 echo "\n\n" . str_repeat('=', strlen($header)) . "\n" . $header . "\n\n";
052 }
053
054 /**
055 * Start profiler snapshot
056 */
057 protected function startCapturing()
058 {
059 $this->startMemory = memory_get_usage();
060 $this->startTime = microtime(true);
061 }
062
063 /**
064 * Echo current profiler output
065 *
066 * @param string $messageTemplate
067 *
068 * @return array
069 */
070 protected function endCapturing($messageTemplate)
071 {
072 $time = microtime(true) - $this->startTime;
073 $memory = memory_get_usage() - $this->startMemory;
074
075 if (gc_enable()) {
076 gc_collect_cycles();
077 }
078
079 echo sprintf($messageTemplate, $time, $memory / 1024) . "\n";
080
081 return array(
082 'time' => $time,
083 'memory' => $memory
084 );
085 }
086
087 /**
088 * Display comparison between two profiles
089 *
090 * @param array $baseProfile
091 * @param array $proxyProfile
092 */
093 protected function compareProfile(array $baseProfile, array $proxyProfile)
094 {
095 $baseMemory = max(1, $baseProfile['memory']);
096 $timeOverhead = (($proxyProfile['time'] / $baseProfile['time']) - 1) * 100;
097 $memoryOverhead = (($proxyProfile['memory'] / $baseMemory) - 1) * 100;
098
099 echo sprintf('Comparison time / memory: %.2f%% / %.2f%%', $timeOverhead, $memoryOverhead) . "\n\n";
100 }
101 }
102