Production - 網站上線前檢測

Test

Google:https://testmysite.thinkwithgoogle.com/
Google2:https://developers.google.com/speed/pagespeed/insights/

Leverage browser caching

(css 和 js 檔名應該要用更改內容後會變的數字)
ref:https://varvy.com/pagespeed/leverage-browser-caching.html

Apache

doc: http://httpd.apache.org/docs/current/mod/mod_expires.html
ref: http://jax-work-archive.blogspot.tw/2010/12/apache-expiresmodexpires.html
記得先開expires mod
# a2enmod expires

.htaccess

<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresDefault A0
    <FilesMatch "\.(jpg|jpeg|png|gif|swf|txt|xml|js|css)$">
      	ExpiresDefault "access plus 2 hours"
    </FilesMatch>
</IfModule>