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A comment on Why Not Make?. Parent comment

Re:Why Not Make? by yetihehe on Thursday November 08, 2018 @08:35AM (#18406107)
Typical optimisation in such cases is to check file hash only when file timestamp or size changes. If after timestamp change hash is the same, it means file was not modified.
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Re:Why Not Make? by rusk on Thursday November 08, 2018 @08:37AM (#18406115)
Okay that's half the problem. Where do I keep my database of hashes though?

W̶h̶i̶c̶h̶ ̶b̶u̶i̶l̶d̶ ̶s̶y̶s̶t̶e̶m̶s̶ ̶a̶c̶t̶u̶a̶l̶l̶y̶ ̶d̶o̶ ̶t̶h̶i̶s̶?̶ [answered by sibling comment]

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