When I try to create a site in the site factory using site skeleton (with at least 25 contents), an Out of memory crash appears:

Fatal error: Allowed memory size of 4294967296 bytes exhausted (tried to allocate 4294967304 bytes) in /Users/ibexa/Developer/poc/site-factory-proto/vendor/ezsystems/ezplatform-kernel/eZ/Publish/Core/Persistence/Legacy/Content/UrlAlias/Handler.php on line 989

This is due to the fix of the ticket IBX-1201, in the correction the variable $alreadyGeneratedAliases is merge with itself which create a very big array more than a million lines with only 25 unique values.