title: What is the purpose of fc-cache in fontconfig?
body: <p>i went through the documentation of fontconfig and i could understand the purpose of fc-match and fc-list. I am not understanding what does fc-cache does? How does it help device to understand things related to fonts?</p>
  
  <p>Could anyone explain what is the purpose of fc-cache in fontconfig?</p>
  
  <p>thanks.</p>