Fast bounds-check for CartesianIndex ranges #55596
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jishnub
added
performance
KristofferC
pushed a commit
that referenced
this pull request
Sep 9, 2024
`StepRangeLen{<:CartesianIndex}` indices have been supported since
v1.11, but bounds-checking for such indices currently falls back to
iterating over the entire range. This PR adds a quick `checkindex` for
such ranges.
The performance improvement as a consequence:
```julia
julia> D = Diagonal(1:10_000);
julia> @Btime checkbounds($D, diagind($D, IndexCartesian()));
6.697 μs (0 allocations: 0 bytes) # nightly, O(n)
4.044 ns (0 allocations: 0 bytes) # This PR, O(1)
```
(cherry picked from commit 6440292)
33 tasks
KristofferC
pushed a commit
that referenced
this pull request
Sep 12, 2024
`StepRangeLen{<:CartesianIndex}` indices have been supported since
v1.11, but bounds-checking for such indices currently falls back to
iterating over the entire range. This PR adds a quick `checkindex` for
such ranges.
The performance improvement as a consequence:
```julia
julia> D = Diagonal(1:10_000);
julia> @Btime checkbounds($D, diagind($D, IndexCartesian()));
6.697 μs (0 allocations: 0 bytes) # nightly, O(n)
4.044 ns (0 allocations: 0 bytes) # This PR, O(1)
```
KristofferC
added a commit
that referenced
this pull request
Sep 17, 2024
Backported PRs: - [x] #55480 <!-- Fix push! for OffsetVectors, add tests for push! and append! on AbstractVector --> - [x] #55443 <!-- Add test for upper/lower/titlecase and fix call --> - [x] #55524 <!-- Set `.jl` sources as read-only during installation --> - [x] #55500 <!-- make jl_thread_suspend_and_get_state safe --> - [x] #55506 <!-- Fix indexing in _mapreducedim for OffsetArrays --> - [x] #55564 <!-- Empty out loaded_precompiles dict instead of asserting it's empty. --> - [x] #55567 <!-- Initialize threadpools correctly during sysimg build --> - [x] #55596 <!-- Fast bounds-check for CartesianIndex ranges --> - [x] #55605 <!-- Reroute Symmetric/Hermitian + Diagonal through triangular --> - [x] #55640 <!-- win: move stack_overflow_warning to the backtrace fiber --> - [x] #55715 <!-- Add precompile signatures to Markdown to reduce latency. --> - [x] #55593 <!-- Fix invalidations for FileIO --> - [x] #55555 <!-- Revert "Don't expose guard pages to malloc_stack API consumers" --> - [x] #55720 <!-- Fix `pkgdir` for extensions --> - [x] #55729 <!-- Avoid confounding compilation side effects of `@time_imports` --> - [x] #55718 <!-- Fix `@time_imports` extension recognition --> - [x] #55522 <!-- Fix tr for Symmetric/Hermitian block matrices --> Contains multiple commits, manual intervention needed: - [ ] #55509 <!-- Fix cong implementation to be properly random and not just cycling. --> Non-merged PRs with backport label: - [ ] #55641 <!-- fall back to slower stat filesize if optimized filesize fails --> - [ ] #55534 <!-- Set stdlib sources as read-only during installation --> - [ ] #55499 <!-- propagate the terminal's `displaysize` to the `IOContext` used by the REPL --> - [ ] #55458 <!-- Allow for generically extracting unannotated string --> - [ ] #55457 <!-- Make AnnotateChar equality consider annotations --> - [ ] #55453 <!-- Privatise the annotations API, for StyledStrings --> - [ ] #55355 <!-- relocation: account for trailing path separator in depot paths --> - [ ] #55220 <!-- `isfile_casesensitive` fixes on Windows --> - [ ] #55169 <!-- `propertynames` for SVD respects private argument --> - [ ] #54457 <!-- Make `String(::Memory)` copy --> - [ ] #53957 <!-- tweak how filtering is done for what packages should be precompiled --> - [ ] #51479 <!-- prevent code loading from lookin in the versioned environment when building Julia --> - [ ] #50813 <!-- More doctests for Sockets and capitalization fix --> - [ ] #50157 <!-- improve docs for `@inbounds` and `Base.@propagate_inbounds` --> - [ ] #41244 <!-- Fix shell `cd` error when working dir has been deleted -->
KristofferC
removed
the
backport 1.11
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StepRangeLen{<:CartesianIndex}indices have been supported since v1.11, but bounds-checking for such indices currently falls back to iterating over the entire range. This PR adds a quickcheckindexfor such ranges.The performance improvement as a consequence: