How know if persistent object cache is installed?

WPPP uses the WordPress object cache for caching. So you need to have any persistend object cache installed to see any speed improvements, e.g. EM Object Cache, APC Object Cache or other caching plugins, which contain an object Cache like W3 Total Cache.
Cachify is a page cache only which doesn’t implement an object cache.

You can verify if an object cache is installed by looking for object-cache.php in wp-content.

As WPPP uses the Default WP-Cache-API it doesn’t conflict with any other caching plugins.

Object cache plugins shouldn’t cause conflicts with Cachify. Cachify only serves front end pages to not logged in users from cache. So installing a cache like EM Object Cache and activating WPPP caching would improve performance for logged in users and backend.

By the way: I’m working towards version 1.0 which will include a simplyfied Interface similar to your previous Suggestion for which I try to implemet some kind of auto detection of optimal Settings.

Ok, thanks for your assistance

I testing in the past some Objects caching and no working fine in my hosting, but I will test EM Object Cache

I think the auto-detection settings is really a great idea

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I am testing EM Object Cache plugin in my website running very slow…

Do you think can works fine with Tribe cache or APC cache and WPPP?

Which object cache is best depends on your hosting environment and if any advanced caching options are available. For APC or similar ro work APC has to be installed on your host.

Most object caches offer some simple methods like DB cache or file cache which should be available on most Hosting evironments. But the performance of these might not be very good.