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... or there is an optimization which reduces operation cost to single stat() call in case file is unmodified?

Please provide a reference link of some kind.

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closed as off-topic by Ward, mdpc, Andrew Schulman, faker, Jenny D Apr 19 '15 at 9:59

This question appears to be off-topic. The users who voted to close gave these specific reasons:

  • "Requests for product, service, or learning material recommendations are off-topic because they attract low quality, opinionated and spam answers, and the answers become obsolete quickly. Instead, describe the business problem you are working on, the research you have done, and the steps taken so far to solve it." – mdpc, Jenny D
  • "Questions should demonstrate reasonable business information technology management practices. Questions that relate to unsupported hardware or software platforms or unmaintained environments may not be suitable for Server Fault - see the help center." – Ward, Andrew Schulman, faker
If this question can be reworded to fit the rules in the help center, please edit the question.

Just read the docs yourself, it's listed in there:

Also, the .htaccess file is loaded every time a document is requested.

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The link is broken. – kasperd Apr 19 '15 at 6:29

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