Merb_piece_cache

Merb_piece_cache 是一个小型的Ruby库，用以提供给 Merb 框架来缓存 HTML 片段。

示例代码：

<!-- rendered every time (because never cached) -->
    <% if @user %>
      Hello <%=h @user %>!
    <% else %>
      <a href="/login">Login</a>
    <% end %>

    <!-- rendered only when cache is expired or not found -->
    <% lifetime = 5*60  # sec, default is nil(=infinity) %>
    <% cache_with("members/index", lifetime) do %>
      <ul>
      <% for member in @members %>
        <li><%=h @member.name %></li>
      <% end %>
      <ul>
    <% end %>