Hi Oerjan

Each Composer block is a page type in EPiServer. When your editors drag a block from the toolbox unto their page a page is created based on that block's page type. Render time of the block depends on what it does, always good to do performance analyzing on the code and cache data that is used regularly.

Hope this helps.

Frederik

Hej Oerjan

Yes, it's correct that each composer block is using a page (pagedata) for storing the data and other information, but the block itselft is an usercontrol and the rendering time depends on what it does. The block data (pagedata) has a cache-handling the same way as a standard cms page. If you have several blocks of the same composer function type then you have difference instances of block data of a composer page type ( equivalent to several pages of a page type).  However, there is a global block which is a single instance of data for all blocks, cross pages on the site.

Note: In the current version (Composer 4 R2), Composer doesn't support the partital cache for the Composer block on page.

Regards

Hieu Doan

Thank you for clarifying this.