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Groups > gnu.bash.bug > #14993
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| From | Chet Ramey <chet.ramey@case.edu> |
| Newsgroups | gnu.bash.bug |
| Subject | Re: Should [[ -v 1 ]] be supported? |
| Date | Fri, 28 Dec 2018 18:23:57 -0600 |
| Organization | ITS, Case Western Reserve University |
| Lines | 16 |
| Approved | bug-bash@gnu.org |
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| References | <CABrM6wmrn2gi8_HgmRg67B5nsgGNFRn8Bn-r20MvC-_2LJHZ0g@mail.gmail.com> <5dac2cf2-2fac-0fd1-058f-6a84a3271738@case.edu> <abd86dbc-f6e2-62bd-e9dc-f959e2dbff9f@inlv.org> <CABrM6wkGwVbPdrXTetVsFCiwDPg5JnK4KRh49WqACsKhrrMMdA@mail.gmail.com> <20181228013623.mersdxbzy64dpldp@crack.deadbeast.net> <CABrM6w=2zrjmV24VAgzioAu2iNcyuf3tsi--cfvkCH6MJ7feRA@mail.gmail.com> <20181228015710.tzzbejk36fsgr5wb@crack.deadbeast.net> <CABrM6wkfvTzY5UBMDz_kNr=imV_KpSsFF6o8fV5RLrKMYrPKgg@mail.gmail.com> |
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| To | Peng Yu <pengyu.ut@gmail.com>, "G. Branden Robinson" <g.branden.robinson@gmail.com> |
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On 12/27/18 11:32 PM, Peng Yu wrote: >> You're whacking moles. Use a profiler. That's what they're for. > > I've already shown that $() is a major problem to slow down the speed > and I have reduced using its usage in my code and significantly > improved the performance. This isn't a major deductive leap, since command substitution forks a child and reads through a pipe. Forking is always more expensive than not. -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
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Re: Should [[ -v 1 ]] be supported? Chet Ramey <chet.ramey@case.edu> - 2018-12-28 18:23 -0600
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