Component getList cache not loading/saving

Question

I've built a custom component, and I'm trying to make it a bit faster, and while I was rooting through model core files I saw that their getItems() uses a caching to reduce DB queries:

$store = $this->getStoreId();
if (isset($this->cache[$store]))
{
    return $this->cache[$store];
}

try
{
    // Load the list items and add the items to the internal cache.
    $this->cache[$store] = $this->_getList($this->_getListQuery(), $this->getStart(), $this->getState('list.limit'));
}

So I'm attempting to duplicate this for my component. Code is practically the same, but whenever I check isset($this->cache[$store]) it is always unset. I'm unsure if I'm having a problem fetching $this->cache[$store] or saving to it.

Answer 1

In your component controller, check the display function:

public function display($cachable = false, $urlparams = false)
{    
    //...

    parent::display($cachable, $safeurlparams);

    return $this;
}

Change it to:

parent::display(true, $safeurlparams);

And test again.