GZIP pre-compression

GZIP pre-compression
Pre_compression 并不是一个nginx必须安装的module. Nginx –V 可以显示出当前nginx已经安装的module. 它的作用是:

we want to serve and effectively reduce the computation power we waste to compress the file each and every time. This recipe will automagically help you serve a pre-compressed gzipped version of your static file.