id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
2226	Please add cache compression	gidiwe2427		"Previously we use redis for our page cache.
And we do a comparison between doing compress before saving the data and uncompress before sending the data to clients.

We do it after our redis enterprise cloud server is slow when there is a surge in traffic. And one of the tech guy recommend to do the compression.
=> https://docs.redislabs.com/latest/ri/memory-optimizations/#compress-values

We achieve 20-30% performance gain with this setup. Compared to just store it directly. Its because compression and decompression in CPU is very very fast compared disk read latency.

This is the latency comparison between CPU and disk in human time:
=> https://formulusblack.com/wp-content/uploads/2019/02/Screen-Shot-2019-02-01-at-12.16.39-PM.png

If Nginx has the ability to compress data before saving. We can also use tmpfs which use extra ram as storage. Which will make it more faster."	enhancement	closed	minor		documentation	1.19.x	wontfix				"nginx version: nginx/1.21.1
built by gcc 9.3.0 (Ubuntu 9.3.0-10ubuntu2) 
built with OpenSSL 1.1.1f  31 Mar 2020
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-compat --with-file-aio --with-threads --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-mail --with-mail_ssl_module --with-stream --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-cc-opt='-g -O2 -fdebug-prefix-map=/data/builder/debuild/nginx-1.21.1/debian/debuild-base/nginx-1.21.1=. -fstack-protector-strong -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fPIC' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -pie'
"