fast timer performance tuning

indra/llcharacter/llcharacter.cpp

indra/llcommon/lldate.cpp

indra/llcommon/llfasttimer.h

indra/llcommon/llstring.cpp

indra/llmessage/llpumpio.cpp

indra/llmessage/lltemplatemessagereader.cpp

indra/llrender/llfontgl.cpp

indra/llui/llfloater.cpp

indra/llui/llkeywords.cpp

indra/llui/lllayoutstack.cpp

indra/llui/llpanel.cpp

indra/llui/lltextbase.cpp

indra/llui/lltexteditor.cpp

indra/llui/lluictrlfactory.cpp

indra/llui/lluictrlfactory.h

indra/llui/lluistring.cpp

indra/llui/llview.cpp

indra/llvfs/llvfile.cpp

indra/llwindow/llwindowwin32.cpp

indra/llxuixml/lltrans.cpp