close method must be called on IgniteCache?

[kcheng.mvp]

here is the document from source code

I just wondering is the `close` method must be called ?

for my case, In my kafka consumer, I did some computation and then put the
data into ignite.

as the message comes in continuous, I just wondering if keep `close` and
`open` frequently will decrease the system performance 

 /**
     * Closes this cache instance.
     * <p>
     * For local cache equivalent to {@link #destroy()}.
     * For distributed caches, if called on clients, stops client cache, if
called on a server node,
     * just closes this cache instance and does not destroy cache data.
     * <p>
     * After cache instance is closed another {@code IgniteCache} instance
for the same
     * cache can be created using {@link Ignite#cache(String)} method.
     */












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