On Sunday, 16 July 2017 at 17:37:34 UTC, Jon Degenhardt wrote:
On Sunday, 16 July 2017 at 17:03:27 UTC, unDEFER wrote:

How to write in D grep not slower than GNU grep?

GNU grep is pretty fast, it's tough to beat it reading one line at a time. That's because it can play a bit of a trick and do the initial match ignoring line boundaries and correct line boundaries later. There's a good discussion in this thread ("Why GNU grep is fast" by Mike Haertel): https://lists.freebsd.org/pipermail/freebsd-current/2010-August/019310.html


Thank you. I understand yet another trick:
$ find . -exec file -bi {} +
is the same
$ file -bi `find .`

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