My gallery is taking too long to display albums

Hi,

This didn't happen to me until couple days ago.

Normally, when I launch the "Gallery" app on my Samsung Galaxy S3, it would take about 5 seconds to display my content ( my photo / albums). Now it take 1 minutes to display my content. I've clear my memory / freed up the CPU but it still takes over a minute for my gallery to display the content. What do I do?

(Btw: it doesn't take long to load when I launch some [not all] applications)