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   1  <?php
   2  /*
   3   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   4   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   5   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   6   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   7   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   8   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   9   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  10   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  11   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  12   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  13   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  14   *
  15   * This software consists of voluntary contributions made by many individuals
  16   * and is licensed under the MIT license.
  17   */
  18  
  19  namespace ProxyManagerTest\Functional;
  20  
  21  use PHPUnit_Framework_TestCase;
  22  
  23  /**
  24   * Base performance test logic
  25   *
  26   * @author Marco Pivetta <ocramius@gmail.com>
  27   * @license MIT
  28   *
  29   * @group Performance
  30   * @coversNothing
  31   */
  32  abstract class BasePerformanceTest extends PHPUnit_Framework_TestCase
  33  {
  34      /**
  35       * @var float time when last capture was started
  36       */
  37      private $startTime   = 0;
  38  
  39      /**
  40       * @var int bytes when last capture was started
  41       */
  42      private $startMemory = 0;
  43  
  44      /**
  45       * {@inheritDoc}
  46       */
  47      public static function setUpBeforeClass()
  48      {
  49          $header = "Performance test - " . get_called_class() . ":";
  50  
  51          echo "\n\n" . str_repeat('=', strlen($header)) . "\n" . $header . "\n\n";
  52      }
  53  
  54      /**
  55       * Start profiler snapshot
  56       */
  57      protected function startCapturing()
  58      {
  59          $this->startMemory = memory_get_usage();
  60          $this->startTime   = microtime(true);
  61      }
  62  
  63      /**
  64       * Echo current profiler output
  65       *
  66       * @param string $messageTemplate
  67       *
  68       * @return array
  69       */
  70      protected function endCapturing($messageTemplate)
  71      {
  72          $time     = microtime(true) - $this->startTime;
  73          $memory   = memory_get_usage() - $this->startMemory;
  74  
  75          if (gc_enable()) {
  76              gc_collect_cycles();
  77          }
  78  
  79          echo sprintf($messageTemplate, $time, $memory / 1024) . "\n";
  80  
  81          return array(
  82              'time'   => $time,
  83              'memory' => $memory
  84          );
  85      }
  86  
  87      /**
  88       * Display comparison between two profiles
  89       *
  90       * @param array $baseProfile
  91       * @param array $proxyProfile
  92       */
  93      protected function compareProfile(array $baseProfile, array $proxyProfile)
  94      {
  95          $baseMemory     = max(1, $baseProfile['memory']);
  96          $timeOverhead   = (($proxyProfile['time'] / $baseProfile['time']) - 1) * 100;
  97          $memoryOverhead = (($proxyProfile['memory'] / $baseMemory) - 1) * 100;
  98  
  99          echo sprintf('Comparison time / memory: %.2f%% / %.2f%%', $timeOverhead, $memoryOverhead) . "\n\n";
 100      }
 101  }