A note to tweaks page speed with Nginx

nginx-pagespeed-tweaks

- Rebuild Nginx with PageSpeed module
 	https://www.digitalocean.com/community/tutorials/how-to-add-ngx_pagespeed-to-nginx-on-debian-8
  
- Enable GZIP
	#---------------------------------------------------------------#
	gzip on;
	gzip_disable "msie6";
	gzip_vary on;
	gzip_proxied any;
	gzip_comp_level 6;
	gzip_buffers 4 32k;
	gzip_http_version 1.1;
	gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
	#---------------------------------------------------------------#
  
- Enable PageSpeed module
	#---------------------------------------------------------------#
	pagespeed on;
	pagespeed FileCachePath /var/ngx_pagespeed_cache;

	pagespeed RewriteLevel CoreFilters;
	pagespeed EnableFilters prioritize_critical_css;
	pagespeed EnableFilters defer_javascript;
	pagespeed EnableFilters sprite_images;
	pagespeed EnableFilters convert_png_to_jpeg,convert_jpeg_to_webp;
	pagespeed EnableFilters collapse_whitespace,remove_comments;
	pagespeed EnableFilters combine_css,extend_cache,rewrite_images;
	pagespeed EnableFilters rewrite_css,rewrite_javascript;
	#---------------------------------------------------------------#
	
- Modify /etc/nginx/sites-enabled/*, and add these lines at 'server' block:
	#---------------------------------------------------------------#
	# Ensure requests for pagespeed optimized resources go to the pagespeed
	# handler and no extraneous headers get set.
	location ~ "\.pagespeed\.([a-z]\.)?[a-z]{2}\.[^.]{10}\.[^.]+" { add_header "" ""; }
	location ~ "^/ngx_pagespeed_static/" { }
	location ~ "^/ngx_pagespeed_beacon" { }
	#---------------------------------------------------------------#