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synchronize HISTORY.md with release-1.10 NEWS #50917

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synchronize HISTORY.md with release-1.10 NEWS #50917

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100 changes: 77 additions & 23 deletions HISTORY.md
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Original file line number Diff line number Diff line change
@@ -1,13 +1,14 @@
Julia v1.10 Release Notes
=========================

New language features
---------------------

* JuliaSyntax.jl is now used as the default parser, providing better diagnostics and faster
parsing. Set environment variable `JULIA_USE_FLISP_PARSER` to `1` to switch back to the old
parser if necessary (and if you find this necessary, please file an issue) ([#46372]).
* `⥺` (U+297A, `\leftarrowsubset`) and `⥷` (U+2977, `\leftarrowless`)
may now be used as binary operators with arrow precedence. ([#45962])
* `⥺` (U+297A, `\leftarrowsubset`) and `⥷` (U+2977, `\leftarrowless`) may now be used as
binary operators with arrow precedence ([#45962]).

Language changes
----------------
Expand All @@ -20,58 +21,70 @@ Language changes
that significantly improves load and inference times for heavily overloaded methods that
dispatch on Types (such as traits and constructors).
* The "h bar" `ℏ` (`\hslash` U+210F) character is now treated as equivalent to `ħ` (`\hbar` U+0127).
* The `@simd` macro now has a more limited and clearer semantics, it only enables reordering and contraction
* The `@simd` macro now has more limited and clearer semantics: it only enables reordering and contraction
of floating-point operations, instead of turning on all "fastmath" optimizations.
If you observe performance regressions due to this change, you can recover previous behavior with `@fastmath @simd`,
if you are OK with all the optimizations enabled by the `@fastmath` macro. ([#49405])
if you are OK with all the optimizations enabled by the `@fastmath` macro ([#49405]).
* When a method with keyword arguments is displayed in the stack trace view, the textual
representation of the keyword arguments' types is simplified using the new
representation of the keyword arguments' type is simplified using the new
`@Kwargs{key1::Type1, ...}` macro syntax ([#49959]).

Compiler/Runtime improvements
-----------------------------

* The `@pure` macro is now deprecated. Use `Base.@assume_effects :foldable` instead ([#48682]).
* The mark phase of the Garbage Collector is now multi-threaded ([#48600]).
* Updated GC heuristics to count allocated pages instead of object sizes ([#50144]). This should help
some programs that consumed excessive memory before.
* The mark phase of the garbage collector is now multi-threaded ([#48600]).
* [JITLink](https://llvm.org/docs/JITLink.html) is enabled by default on Linux aarch64 when Julia is linked to LLVM 15 or later versions ([#49745]).
This should resolve many segmentation faults previously observed on this platform.

Command-line option changes
---------------------------

* New option `--gcthreads` to set how many threads will be used by the Garbage Collector ([#48600]).
The default is set to `N/2` where `N` is the amount of worker threads (`--threads`) used by Julia.
* New option `--gcthreads` to set how many threads will be used by the garbage collector ([#48600]).
The default is `N/2` where `N` is the number of worker threads (`--threads`) used by Julia.

Build system changes
--------------------

* SparseArrays and SuiteSparse are no longer included in the default system image, so the core
language no longer contains GPL libraries. However, these libraries are still included
alongside the language in the standard binary distribution ([#44247], [#48979], [#49266]).

New library functions
---------------------
* `tanpi` is now defined. It computes tan(πx) more accurately than `tan(pi*x)` ([#48575]).

* `tanpi` is now defined. It computes tan(π*x) more accurately than `tan(pi*x)` ([#48575]).
* `fourthroot(x)` is now defined in `Base.Math` and can be used to compute the fourth root of `x`.
It can also be accessed using the unicode character `∜`, which can be typed by `\fourthroot<tab>` ([#48899]).
* `Libc.memmove`, `Libc.memset`, and `Libc.memcpy` are now defined, whose functionality matches that of their respective C calls.
* `Base.isprecompiled(pkg::PkgId)` to identify whether a package has already been precompiled ([#50218]).
* `Base.isprecompiled(pkg::PkgId)` has been added, to identify whether a package has already been precompiled ([#50218]).

New library features
--------------------
* The `initialized=true` keyword assignment for `sortperm!` and `partialsortperm!`
is now a no-op ([#47979]). It previously exposed unsafe behavior ([#47977]).

* `binomial(x, k)` now supports non-integer `x` ([#48124]).
* A `CartesianIndex` is now treated as a "scalar" for broadcasting ([#47044]).
* `printstyled` now supports italic output ([#45164]).
* `parent` and `parentindices` support `SubString`s
* `parent` and `parentindices` support `SubString`s.
* `replace(string, pattern...)` now supports an optional `IO` argument to
write the output to a stream rather than returning a string ([#48625]).
* `startswith` now supports seekable `IO` streams ([#43055]).

Standard library changes
------------------------

* `startswith` now supports seekable `IO` streams ([#43055])
* printing integral `Rational`s will skip the denominator in `Rational`-typed IO context (e.g. in `Arrays`) ([#45396])
* The `initialized=true` keyword assignment for `sortperm!` and `partialsortperm!`
is now a no-op ([#47979]). It previously exposed unsafe behavior ([#47977]).
* Printing integral `Rational`s will skip the denominator in `Rational`-typed IO context (e.g. in arrays) ([#45396]).

#### Package Manager

* `Pkg.precompile` now accepts `timing` as a keyword argument which displays per package timing information for precompilation (e.g. `Pkg.precompile(timing=true)`)
* `Pkg.precompile` now accepts `timing` as a keyword argument which displays per package timing information for precompilation (e.g. `Pkg.precompile(timing=true)`).

#### LinearAlgebra

* `AbstractQ` no longer subtypes to `AbstractMatrix`. Moreover, `adjoint(Q::AbstractQ)`
* `AbstractQ` no longer subtypes `AbstractMatrix`. Moreover, `adjoint(Q::AbstractQ)`
no longer wraps `Q` in an `Adjoint` type, but instead in an `AdjointQ`, that itself
subtypes `AbstractQ`. This change accounts for the fact that typically `AbstractQ`
instances behave like function-based, matrix-backed linear operators, and hence don't
Expand All @@ -89,12 +102,13 @@ Standard library changes
* The `norm` of the adjoint or transpose of an `AbstractMatrix` now returns the norm of the
parent matrix by default, matching the current behaviour for `AbstractVector`s ([#49020]).
* `eigen(A, B)` and `eigvals(A, B)`, where one of `A` or `B` is symmetric or Hermitian,
are now fully supported ([#49533])
are now fully supported ([#49533]).
* `eigvals/eigen(A, cholesky(B))` now computes the generalized eigenvalues (`eigen`: and eigenvectors)
of `A` and `B` via Cholesky decomposition for positive definite `B`. Note: The second argument is
the output of `cholesky`.

#### Printf

* Format specifiers now support dynamic width and precision, e.g. `%*s` and `%*.*g` ([#40105]).

#### REPL
Expand All @@ -105,13 +119,53 @@ Standard library changes
#### Test

* The `@test_broken` macro (or `@test` with `broken=true`) now complains if the test expression returns a
non-boolean value in the same way as a non-broken test. ([#47804])
* When a call to `@test` fails or errors inside a function, a larger stacktrace is now printed such that the location of the test within a `@testset` can be retrieved ([#49451])
non-boolean value in the same way as a non-broken test ([#47804]).
* When a call to `@test` fails or errors inside a function, a larger stacktrace is now printed such that the location of the test within a `@testset` can be retrieved ([#49451]).

#### InteractiveUtils

* `code_native` and `@code_native` now default to intel syntax instead of AT&T.
* `@time_imports` now shows the timing of any module `__init__()`s that are run ([#49529])
* `code_native` and `@code_native` now default to intel syntax instead of AT&T.
* `@time_imports` now shows the timing of any module `__init__()`s that are run ([#49529]).

Deprecated or removed
---------------------

* The `@pure` macro is now deprecated. Use `Base.@assume_effects :foldable` instead ([#48682]).

<!--- generated by NEWS-update.jl: -->
[#31836]: https://github.com/JuliaLang/julia/issues/31836
[#40105]: https://github.com/JuliaLang/julia/issues/40105
[#43055]: https://github.com/JuliaLang/julia/issues/43055
[#44247]: https://github.com/JuliaLang/julia/issues/44247
[#45164]: https://github.com/JuliaLang/julia/issues/45164
[#45396]: https://github.com/JuliaLang/julia/issues/45396
[#45962]: https://github.com/JuliaLang/julia/issues/45962
[#46196]: https://github.com/JuliaLang/julia/issues/46196
[#46372]: https://github.com/JuliaLang/julia/issues/46372
[#46874]: https://github.com/JuliaLang/julia/issues/46874
[#47044]: https://github.com/JuliaLang/julia/issues/47044
[#47804]: https://github.com/JuliaLang/julia/issues/47804
[#47977]: https://github.com/JuliaLang/julia/issues/47977
[#47979]: https://github.com/JuliaLang/julia/issues/47979
[#48124]: https://github.com/JuliaLang/julia/issues/48124
[#48575]: https://github.com/JuliaLang/julia/issues/48575
[#48600]: https://github.com/JuliaLang/julia/issues/48600
[#48625]: https://github.com/JuliaLang/julia/issues/48625
[#48682]: https://github.com/JuliaLang/julia/issues/48682
[#48899]: https://github.com/JuliaLang/julia/issues/48899
[#48979]: https://github.com/JuliaLang/julia/issues/48979
[#49020]: https://github.com/JuliaLang/julia/issues/49020
[#49110]: https://github.com/JuliaLang/julia/issues/49110
[#49266]: https://github.com/JuliaLang/julia/issues/49266
[#49405]: https://github.com/JuliaLang/julia/issues/49405
[#49451]: https://github.com/JuliaLang/julia/issues/49451
[#49529]: https://github.com/JuliaLang/julia/issues/49529
[#49533]: https://github.com/JuliaLang/julia/issues/49533
[#49745]: https://github.com/JuliaLang/julia/issues/49745
[#49795]: https://github.com/JuliaLang/julia/issues/49795
[#49959]: https://github.com/JuliaLang/julia/issues/49959
[#50144]: https://github.com/JuliaLang/julia/issues/50144
[#50218]: https://github.com/JuliaLang/julia/issues/50218

Julia v1.9 Release Notes
========================
Expand Down