How Caching Works?

[kkarki]

I've seen that XenForo uses heavy caching and that's the reason behind it's so fast.

But, I would like to ask how XenForo invalidates a thread-listing page or post page cache so that users see latest information in ftont-end. I've seen that there's cache_lifetime => 10800 in config.php, so does this time is considered to invalidate a cache?

 

[Mike]

XenForo doesn't use caching like that. Out of the box, it doesn't use that much (memory) caching either. If you have caching configured in config.php, that's something you added.

 

[kkarki]

Thanks Mike,

But, what's the reason behind it's so fast?

 

[Mike]

It's just something we try to keep in mind at all stages of development.