You are browsing the old Contao 3 extension repository. Contao 3 is no longer maintained as of June 2019! You can find the Contao 4 extensions on extensions.contao.org.
Extensions > deferred_search_index
Let DSI index your pages in chunks using the cron job
This extension provides the possibility to build the search index using a cron. This enables you to let Contao rebuild your search index on a regular basis and in chunks of e.g. 100 pages a time. DSI gets all the searchable pages (Developers: you can use a DSI-specific "dsi_searchablePages" Hook to add your pages only if DSI is installed - useful if you have a big bunch of pages you want to add to the index) and does the rest for you.