javascript - Does Apache use file timestamps to check whether a resource has been modified?

Question

I am developing an html page referencing a large Javascript file (1MB+) which is seldom modified. From here, I get that the js file will not be resent if not modified.

My question is: how does Apache checks whether an ftp uploaded javascript file has been modified? Is it from its file timestamp? If not, where does it get this information? I want to understand the process to control performance issues.

Answer 1

静的ファイルの場合、通常は への呼び出しをstat()使用して、ファイル サイズまたは変更時刻が変更されたかどうかを確認します。

Caching Guideでは詳細が説明されており、セクションA Brief Guide to Conditional Requestsにも上記のリファレンスが含まれています。