Why does Safari not accept GZIP compression?

Question

I have a pretty big JavaScript file here which I want to embed into my website. The HTTP server is smart enough to GZIP the file before delivering it to the browser.

However, I tested with Google Chrome and Safari.

On Chrome, it works very well. 400K go down compressed to around 100k:

BUT on Safari compression doesn't work:

The funny thing is, in gz2b.png you can clearly see that content-encoding is set to "gzip".

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Note: I already read up on a GZIP-Bug in Safari where files cannot end on ".gz" or Safari won't accept GZIP. Since my file does not end on .gz this problem shouldn't be an issue.

Answer 1

I've run into this problem as well, while trying to optimize the load time of a website on iOS7 Safari mobile iPad.

• Encoded = uncompressed filesize, from server
• Decoded = uncompressed filesize, locally
• Transferred = uncompressed file size + headers sent and received
• Content-Length = compressed file sent, from server

Safari chose a really weird way of representing these numbers in their debugger.