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stop using rand(lo:hi) for QuickerSort pivot selection #48241

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merged 2 commits into from
Jan 12, 2023

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see discussion here: #45222 (comment)
fixes #48230
takes sorting out of the discussion in #48069
This is a regression in how easy it is to construct a pathological input with respect to master and julia-1.9.0-beta2, but not w.r.t. 1.8.5.

Also fix a comment that I noticed had gone stale.

@LilithHafner LilithHafner added randomness Random number generation and the Random stdlib sorting Put things in order labels Jan 11, 2023
base/sort.jl Outdated Show resolved Hide resolved
Co-authored-by: Fredrik Ekre <ekrefredrik@gmail.com>
@LilithHafner LilithHafner added backport 1.9 Change should be backported to release-1.9 merge me PR is reviewed. Merge when all tests are passing labels Jan 11, 2023
@LilithHafner LilithHafner merged commit 793eaa3 into master Jan 12, 2023
@LilithHafner LilithHafner deleted the derandomize-pivot-selection branch January 12, 2023 00:17
@LilithHafner LilithHafner removed the merge me PR is reviewed. Merge when all tests are passing label Jan 12, 2023
KristofferC pushed a commit that referenced this pull request Jan 13, 2023
Co-authored-by: Fredrik Ekre <ekrefredrik@gmail.com>
(cherry picked from commit 793eaa3)
@KristofferC KristofferC mentioned this pull request Jan 13, 2023
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@KristofferC KristofferC removed the backport 1.9 Change should be backported to release-1.9 label Jan 17, 2023
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Default sort algorithm affects global RNG
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