Performance enhancements in the printf implementation.

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diff --cc manifest
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- C Factor\sconstant\sfunctions\sout\sof\sthe\sinner\sloop\ssince\sthey\sare\smore\sexpensive\nthan\sthe\sextra\sOP_Copy\sneeded\sto\smove\sthe\sresult\sinto\splace.
- D 2017-01-04T04:18:00.128
 -C Changes\sto\sthe\sprintf\simplementation\sfor\sbetter\sperformance.
 -D 2017-01-04T00:26:28.506
++C Performance\senhancements\sin\sthe\sprintf\simplementation.
++D 2017-01-04T13:09:05.205
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