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Faster implementation of rand(Range1) #3779

Merged
merged 1 commit into from
Jul 21, 2013
Merged

Faster implementation of rand(Range1) #3779

merged 1 commit into from
Jul 21, 2013

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lindahua
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Faster & simpler implementation of rand(Range1), and it strictly guarantees equal probabilities of choosing each integer within the range.

My benchmark shows that it is about 1.7x - 2.1x faster than the original implementation.

@johnmyleswhite
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+1

@StefanKarpinski
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This is great. As far as I'm concerned you can merge at will.

lindahua added a commit that referenced this pull request Jul 21, 2013
Faster implementation of rand(Range1)
@lindahua lindahua merged commit 878e8d2 into JuliaLang:master Jul 21, 2013
ulen = convert(Uint128, length(r))
convert(Int128, first(r) + randu(ulen))
end

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I wish there were a more compact way to write the above three functions without all the duplication. How about convert these to a macro?

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A macro seems like overkill here. Surely there is another way to write it. Maybe randu(unsigned(length(r)))?

@ViralBShah ViralBShah added the system:32-bit Affects only 32-bit systems label Nov 22, 2014
@tkelman
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tkelman commented Nov 22, 2014

@ViralBShah I think you mis-labeled this

@tkelman tkelman added randomness Random number generation and the Random stdlib and removed system:32-bit Affects only 32-bit systems labels Nov 22, 2014
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Thanks. In the labelling spree, this happened a few times and I thought I had fixed all the cases.

KristofferC added a commit that referenced this pull request Feb 8, 2024
…53220)

Replaces #53216 (I can't push to
that repo branch)

Adds
- making pkgimages for REPLExt
- Fixes PkgCompletionProvider location

Stdlib: Pkg
URL: https://github.com/JuliaLang/Pkg.jl.git
Stdlib branch: master
Julia branch: master
Old commit: f3b81f1aa
New commit: 6dd0e7c9e
Julia version: 1.11.0-DEV
Pkg version: 1.11.0
Bump invoked by: @IanButterworth
Powered by:
[BumpStdlibs.jl](https://github.com/JuliaLang/BumpStdlibs.jl)

Diff:
JuliaLang/Pkg.jl@f3b81f1...6dd0e7c

```
$ git log --oneline f3b81f1aa..6dd0e7c9e
6dd0e7c9e Revert "add test for recurring precompile" (#3779)
dbf114fa9 Merge pull request #3777 from JuliaLang/kc/repl_extension
a49d47981 fixup
e3edf3917 avoid prompting for git creds on CI (#3778)
510454343 make the `REPL` specific code into an extension
12d2de14e make `pkgstr` independent of REPL
```

---------

Co-authored-by: Dilum Aluthge <dilum@aluthge.com>
Co-authored-by: Valentin Churavy <vchuravy@users.noreply.github.com>
Co-authored-by: Kristoffer Carlsson <kcarlsson89@gmail.com>
Co-authored-by: Jameson Nash <vtjnash@gmail.com>
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6 participants