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Add a small note about the compressing the file, and how that helps the application.

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Anuj Dutta 2012-12-13 16:28:43 +00:00
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guides/source/asset_pipeline.md
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@ -272,7 +272,8 @@ $('#logo').attr src: "<%= asset_path('logo.png') %>"
### Manifest Files and Directives
Sprockets uses manifest files to determine which assets to include and serve. These manifest files contain _directives_ — instructions that tell Sprockets which files to require in order to build a single CSS or JavaScript file. With these directives, Sprockets loads the files specified, processes them if necessary, concatenates them into one single file and then compresses them (if `Rails.application.config.assets.compress` is true). By serving one file rather than many, the load time of pages can be greatly reduced because the browser makes fewer requests.
Sprockets uses manifest files to determine which assets to include and serve. These manifest files contain _directives_ — instructions that tell Sprockets which files to require in order to build a single CSS or JavaScript file. With these directives, Sprockets loads the files specified, processes them if necessary, concatenates them into one single file and then compresses them (if `Rails.application.config.assets.compress` is true). By serving one file rather than many, the load time of pages can be greatly reduced because the browser makes fewer requests. In addition, compressing one concatenated file, reduces the file size and the browser can download it quicker.
For example, a new Rails application includes a default `app/assets/javascripts/application.js` file which contains the following lines: