title: Increase 4k buffer size for libfuse readdirplus?
body: <p>Is there a way to modify or increase the size value that is passed to 
  the readdir/readdirplus functions?</p>
  
  <p>My implementation uses the low-level API.
  With directories that are rather complex, deeply nested, or contain a 
  large amount of sub-directories, I experience a performance impact from 
  what seems to be due to the amount of recurring calls to 
  readdir/readdirplus. It seems a buffer larger than 4096 bytes (which is 
  what is passed in now) would help tremendously.</p>
  
  <p>I've modified max_read, max_readahead, and max_write values but have not 
  seen this have any effect.</p>
  
  <p>Thank you in advance.</p>