我为什么要在HTTP头不COM preSS图像？ [英] Why I should not compress images in HTTP headers?

问题描述

我读到的HTTP头COM pression一些文章。今天，我安装了YSlow的，并建议我COM preSS的资源（文/ HTML，JavaScript，CSS和图像）。现在，我在看文档 Apache的mod_deflate模块但在这个例子不COM preSS图像。

I read some articles about HTTP headers compression. Today I installed YSlow and it recommends that I compress the resources (text/html, javascript, css and images). Now I'm reading the documentation for Apache mod_deflate but in the example don't compress images.

我应该还是我不应该在我的网站COM preSS图像？

Should I or should I not compress images in my site?

推荐答案

您的图像应该已经融为一体pressed - 任何额外的COM pression不会对文件大小任何明显的效果，反而会增加处理时间

Your images should already be compressed - any extra compression won't have any noticeable effect on filesize, but will increase processing time.

• .png文件使用DEFLATE COM pression 了。


• .jpg文件通常使用有损COM pression 。


• .gif文件使用LZW COM pression 。

• .png files use DEFLATE compression already.
• .jpg files generally use lossy compression.
• .gif files use LZW compression.

的COM pressing，其上已经融为一体pressed很少导致在文件大小的减少，并能往往会增加文件大小。

Compressing files that have already been compressed very rarely results in a reduction in filesize, and can often increase filesize.

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