Java’s Scanner vs String.split() vs StringTokenizer; which should I use?

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Did some metrics around these in a single threaded model and here are the results I got.

~~~~~~~~~~~~~~~~~~Time Metrics~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~ Tokenizer  |   String.Split()   |    while+SubString  |    Scanner    |    ScannerWithCompiledPattern    ~
~   4.0 ms   |      5.1 ms        |        1.2 ms       |     0.5 ms    |                0.1 ms            ~
~   4.4 ms   |      4.8 ms        |        1.1 ms       |     0.1 ms    |                0.1 ms            ~
~   3.5 ms   |      4.7 ms        |        1.2 ms       |     0.1 ms    |                0.1 ms            ~
~   3.5 ms   |      4.7 ms        |        1.1 ms       |     0.1 ms    |                0.1 ms            ~
~   3.5 ms   |      4.7 ms        |        1.1 ms       |     0.1 ms    |                0.1 ms            ~
____________________________________________________________________________________________________________

The out come is that Scanner gives the best performance, Now the same needs to be evaluated on a multithreaded mode ! One of my senior’s say that the Tokenizer gives a CPU spike and String.split does not.

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