simplestanswerofyourquestionwhenPHPbecomesslow?onlywhenyouuseitinefficiently,AlthoughsomelanguagesareslowerintheirimplementationsbutPHPisnotoneofthem.ThemainreasonsofPHPslownessisthereasonthatmostPHPprogrammers(alsomostofotherlanguagesprogrammersaswell)careverylessaboutoptimizations.TheyincludehugeCSSandJQuerylibrariesthattheyneverusedintheircode.PHPisveryfriendlywithHTML...