place holder for loop comparision
moved network in front

large scale improvement at first
one slide for less file loading
cache option
removed fun with javascript
added todo list for u might not need jquery
clientServer
added some image link
added cdn image
gzip img
added for in loop section
some more link from js weekly
equality overkill == sign
potato potato
finish equality overkill
read some todo list to work list
added image
added function caching
explore todo list and break it down
query selector all perf