: How do I ensure that my content is sent via gzip in Apache? Is there some setting that I can search for in Apache configurations to make sure that all pages, CSS, and JavaScript are sent

@RJPawlick198

RedBot, successor to the Cacheability Engine, does a really great job of testing a page and contents for several performance and cacheability metrics in a simple, easy-to-read grid format.

Example: redbot.org/?descend=True&uri=http://www.microsoft.com/en/us/default.aspx

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@Voss4911412

I put the following in my httpd.conf and it seems to work:

# 20100709 added etag code
FileETag MTime Size

# 20100709 added compression START

# Insert filter
SetOutputFilter DEFLATE

# Netscape 4.x has some problems...
BrowserMatch ^Mozilla/4 gzip-only-text/html

# Netscape 4.06-4.08 have some more problems
BrowserMatch ^Mozilla/4.0[678] no-gzip

# MSIE masquerades as Netscape, but it is fine
# BrowserMatch bMSIE !no-gzip !gzip-only-text/html

# NOTE: Due to a bug in mod_setenvif up to Apache 2.0.48
# the above regex won't work. You can use the following
# workaround to get the desired effect:
BrowserMatch bMSI[E] !no-gzip !gzip-only-text/html

# Don't compress images
SetEnvIfNoCase Request_URI
.(?:gif|jpe?g|png)$ no-gzip dont-vary

# Make sure proxies don't deliver the wrong content
Header append Vary User-Agent env=!dont-vary

# 20100709 added compression END


This website has a great tester for seeing if your page is GZIP'd: www.whatsmyip.org/http_compression/

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@Kristi941

Install ySlow in Firefox and it will tell you which items are being gzipped.

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