Missing documentation for RouteCollector configuration

[boesing]

Documentation

There seems to be a hidden config flag to disable the route collectors "duplication check" which can have performance improvements.
It is achieved by providing the following config via config service:

use Mezzio\Router\RouteCollector;
return [ RouteCollector::class => ['detect_duplicates' => false] ];

mezzio-router/src/RouteCollectorFactory.php

Lines 55 to 65 in 09e5da5

	if (! isset($config[RouteCollector::class])) {
	return true;
	}
	$collectorOptions = $config[RouteCollector::class] ?? [];
	if (! is_array($collectorOptions) || ! isset($collectorOptions['detect_duplicates'])) {
	return true;
	}
	return (bool) $collectorOptions['detect_duplicates'];

Feature was introduced with #3 back in january 2021. Somehow, no1 requested the author to add the feature to the documentation :-(

---

If we start document this feature, I wonder if we should instead deprecate the RouteCollector::class config key.

1. Its a concrete implementation and not the interface
2. it does not align with other router specific config keys such as fastroute route cache (which is router.fastroute)

I would recommend using router.detect_duplicates config key:

return [
     'router' => ['detect_duplicates' => false],
];

We can still support RouteCollector::class for this major and drop it in v4.

Ref: #3
Ref: https://github.com/mezzio/mezzio-fastroute/blob/31d63fc0736c75b5dbd0d5c7ae9251fb70082be0/src/FastRouteRouterFactory.php#L19-L24