…e regexp (nicolas-grekas)This PR was merged into the 4.1-dev branch.Discussion---------- [Routing] Match 77.7x faster by compiling routes in one regexp| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | no| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets | -| License       | MIT| Doc PR        | -Builds on top of#25961 andhttp://nikic.github.io/2014/02/18/Fast-request-routing-using-regular-expressions.html to make routing 77.7x faster (measured when matching the last dynamic route of 400 static + 400 dynamic routes.)More benchs welcomed.- [x] check static routes first in a switch- [x] group same-modifiers regexps- [x] put condition-less routes in a static map, in a switch's "default"- [x] match host+pathinfo at the same time- [x] group same-host regexps in sub-patterns- [x] consider the host to move more static routes in the static switch- [x] move static single-route "case" to "default" by adding requirements to $routes- [x] group same-static-prefix in sub-patterns- [x] group consecutive same-regex in a single "case"- [x] move dynamic single-route "case" to "default" by adding requirements to $routes- [x] extract host variables from the main match and remove the current 2nd match- [x] extend same-prefix grouping to placeholders- [x] group same-suffix hosts togetherHere is my benchmarking code:```php<?phpnamespace Symfony\Component\Routing;require 'vendor/autoload.php';$routes = new RouteCollection();for ($i = 0; $i < 400; ++$i) {    $routes->add('r'.$i, new Route('/abc'.$i));    $routes->add('f'.$i, new Route('/abc{foo}/'.$i));}$dumper = new Matcher\Dumper\PhpMatcherDumper($routes);eval('?'.'>'.$dumper->dump());$router = new \ProjectUrlMatcher(new RequestContext());$i = 10000;$s = microtime(1);while (--$i) {    $router->match('/abcdef/399');}echo 'Symfony: ', 1000 * (microtime(1) - $s), "\n";namespace FastRoute;$dispatcher = simpleDispatcher(function(RouteCollector $r) {    for ($i = 0; $i < 400; ++$i) {        $r->addRoute('GET', '/abc'.$i, 'r'.$i);        $r->addRoute('GET', '/abc{foo}/'.$i, 'f'.$i);    }});$i = 10000;$s = microtime(1);while (--$i) {    $dispatcher->dispatch('GET', '/abcdef/399');}echo 'FastRoute: ', 1000 * (microtime(1) - $s), "\n";```Commits-------f933f70 [Routing] Match 77.7x faster by compiling routes in one regexp