Benchmark method taken from Instant Share app

benchmark.php

<?php    
    /**
     * Benchmark
     * 
     * @category debug
     */
    public function benchmark() {
        /** @var integer $timeStart **/
        $timeStart = microtime(true);
        
        echo 'RUNNING BENCHMARK, PLEASE WAIT.</br>'. PHP_EOL;
        
        /** @var string $name **/
        $name = 'test.zip';
        
        set_time_limit( 600 );
        
        /** @var string $packageDir **/
        $packageDir = Config::$tmpDir . DIRECTORY_SEPARATOR . 'test';
        
        if( file_exists( $packageDir ) ) {
            
            /**
            * Select packing method
            */ 
            // internal zipArchive
            if( Config::$packingMethod == 'internal' ) {
                $zipArchive = new ZipArchive();
                $zipArchive->open( Config::$uploadPath . DIRECTORY_SEPARATOR  . $name, \ZipArchive::CREATE);
                $zipArchive->addDirectory(  Config::$tmpDir . DIRECTORY_SEPARATOR . 'test' );
                $zipArchive->close();
            }
            // command line
            elseif( Config::$packingMethod == 'command' ) {
                echo 'USING COMMAND LINE MODE!<br />' . PHP_EOL;
                
                /** @var $command **/
                $command = vsprintf_named( Config::$packingCommand, [
                    'name' => Config::$uploadPath . DIRECTORY_SEPARATOR  . $name,
                    'path' => Config::$tmpDir . DIRECTORY_SEPARATOR . 'test',
                ] );
                
                exec( $command, $output, $return );
                
                echo $command . '<br />' . PHP_EOL;
                
                echo 'RUNNING AS: ' . get_current_user() . '<br />' . PHP_EOL;
                
                echo implode( ', ', $output ) . ' WITH CODE ' . $return . '<br />' . PHP_EOL;
                
                // Return will return non-zero upon an error
                if( $return !== 0) {
                $error = true;
                    echo 'COMMAND LINE ERROR!<br />' . PHP_EOL;
                }
            }
        } else {
            echo "SORRY BUT TEST DIR DOES NOT EXIST. PLEASE CREATE IT.</br>" . PHP_EOL;
        }
      
        /** @var float $time Execution time. **/
        $time = number_format(( microtime(true) - $timeStart), 4);
        echo "FINISHED SUCCESSFULLY IN: $time SECONDS.</br>" . PHP_EOL;
        
    }