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I have DreamHost VPS hosting, the server is Apache. When I load my web-site in the browser, and inspect the HTTP reqests/responses in my browser's dev tools, I can see that my browser sends

Accept-Encoding    gzip, deflate

in all HTTP requests it makes (for all file types). However, when I inspect the HTTP responses, I see this header for the main HTML file:

Content-Encoding    gzip

but this header is not present in HTTP responses for my JS, CSS, and image files. Does this mean that my server doesn't GZIP these types of files?

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You can check performance issues using online tools like WebPageTest.org (click the Performance Review tab after running the test). If you need help configuring mod_gzip for Apache, you're best bet is to post your current configuration. We have several people who know mod_gzip inside and out. –  Chris S Dec 19 '12 at 15:54
    
@ChrisS I've done that test. It indicates that my js, and css files are not being gzipped. I'll have to sort this out with my hosting provider. I have managed hosting, so I'm not sure how much I am able to configure myself; I didn't notice any "GZIP" options in my "panel". –  Šime Vidas Dec 19 '12 at 16:10
    
Ah, so you don't have a VPS then... You just have managed hosting. That does make a difference. –  Chris S Dec 19 '12 at 16:18
    
@ChrisS As far as I know, I have VPS hosting. I wrote "managed", because I didn't have to configure anything, i.e. it came pre-configured. DreamHost writes that it provides "High Level of Control", so I guess it's not managed then. –  Šime Vidas Dec 19 '12 at 16:54

1 Answer 1

Yes, it means that its not gzip these files.

Test your setting using Yslow, https://addons.mozilla.org/en-US/firefox/addon/yslow/ . It will give you more guidelines to optimize your server.

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YSlow doesn't seem to work in my Firefox -.-. I have the latest versions of both Firefox, and YSlow plug-in. –  Šime Vidas Dec 19 '12 at 15:45
    
Yslow is available for chrome as well. –  Rishav Dec 19 '12 at 15:49

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