Added some comments for future performance work
Added some comments for future performance work

modulexcite/node-htmlparser,broadly/htmlparser2,jasonsanjose/htmlparser2,modulexcite/node-htmlparser,magicode/htmlparser2,laomu1988/node-htmlparser,tautologistics/node-htmlparser,mail-apps/htmlparser2,fasterize/node-htmlparser,laomu1988/node-htmlparser,frontapp/htmlparser2,jasonsanjose/htmlparser2,kirbysayshi/node-htmlparser,frontapp/htmlparser2,mail-apps/htmlparser2,vtamara/node-htmlparser,bergie/node-htmlparser,broadly/htmlparser2,magicode/htmlparser2,ldrmcml/node-htmlparser,ldrmcml/node-htmlparser