Profiler is always overwriting the CSV file to debug multiple subsequent requests

Question

I have enabled the profiler in order to find out which events are triggered during order creation and processing.

php bin/magento dev:profiler:enable csvfile

But it is alway overwriting

var/log/profiler.csv

On each request.

How can I keep all profiler output across requests?

Answer 1

A temporary are to change this is to edit this line:

vendor/magento/framework/Profiler/Driver/Standard/Output/Csvfile.php:41

To

public function __construct(array $config = null)
{
    parent::__construct($config);
    # change this line, append uniqid()
    $this->_filePath = $this->_parseFilePath($config) . uniqid('', true);
    $this->_delimiter = isset($config['delimiter']) ? $config['delimiter'] : ',';
    $this->_enclosure = isset($config['enclosure']) ? $config['enclosure'] : '"';
}

Of course this is a core patch and only for temporary use.