Collection Tree causing a 504 error

Hi all,

We’ve got an Omeka installation with 164 root Collections and 10094 nested Collections. The Collection Tree plugin is causing a 504 error and a overall poor performance, specially when browsing Collections and accessing the /collection-tree page. Since nested Collections is a basic feature in our project, does anyboy have any solution? Any tip or idea?

Thanks in advance.

Running: Omeka 2.6, Collection Tree 2.1, nginx, PHP 7.

Sample error log:

[23-Apr-2018 14:22:49 UTC] PHP Fatal error: Maximum execution time of 300 seconds exceeded in /home/xxxxx/plugins/CollectionTree/models/Table/CollectionTree.php on line 279
[23-Apr-2018 14:24:37 UTC] PHP Fatal error: Maximum execution time of 300 seconds exceeded in /home/xxxxx/plugins/CollectionTree/models/Table/CollectionTree.php on line 275
[23-Apr-2018 14:24:37 UTC] PHP Fatal error: Call to a member function real_escape_string() on string in /home/xxxxx/application/libraries/Zend/Db/Adapter/Mysqli.php on line 110

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