config.xml

<?xml version="1.0" ?>
<phpunit>
        <listeners>
                <listener class="TimeLoggerListener" file="./TimeLoggerListener.php">
                        <arguments>
                                <string>/tmp/test-time.csv</string>
                        </arguments>
                </listener>
        </listeners>
</phpunit>

TimeLoggerListener.php

<?php
require_once 'PHPUnit/Framework.php';

class TimeLoggerListener implements PHPUnit_Framework_TestListener {
	private $_filename;
	private $_handle;

	public function __construct($filename) {
		$this->_filename = $filename;
	}

	public function endTest(PHPUnit_Framework_Test $test, $time) {
		$this->_writeLog(get_class($test) . '::' . $test->getName() . "\t" . $time);
	}

	private function _writeLog($message) {
		$file = $this->_getHandle();
		fwrite($file, $message . "\n");
	}

	private function _getHandle() {
		if(false == isset($this->_handle)) {
			$handle = fopen($this->_filename, 'a');
		} else {
			$handle = $this->_handle;
		}
		return $handle;
	}

	/*****************************************************************************************
	 * These functions are required by the interface, but aren't actually used for anything. *
	 *****************************************************************************************/

	public function addError(PHPUnit_Framework_Test $test, Exception $e, $time) { }

	public function addFailure(PHPUnit_Framework_Test $test, PHPUnit_Framework_AssertionFailedError $e, $time) { }

	public function addIncompleteTest(PHPUnit_Framework_Test $test, Exception $e, $time) { }

	public function addSkippedTest(PHPUnit_Framework_Test $test, Exception $e, $time) { }

	public function startTest(PHPUnit_Framework_Test $test) { }

	public function startTestSuite(PHPUnit_Framework_TestSuite $suite) { }

	public function endTestSuite(PHPUnit_Framework_TestSuite $suite) { }
}
?>