Are these torrc entries necessary?

[Matthew]

  Probably well over a year ago Tor seemed really slow and I wanted to 
speed it up.   These settings were recommended (I can't find the website now).

CircuitBuildTimeout 30
NumEntryGuards 6
KeepalivePeriod 60
NewCircuitPeriod 15

Are these valid today?  AIUI Tor is way faster than it was a year or so ago?

Thanks.
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