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diff --git a/vendor/rayon/RELEASES.md b/vendor/rayon/RELEASES.md new file mode 100644 index 0000000..c1e42de --- /dev/null +++ b/vendor/rayon/RELEASES.md @@ -0,0 +1,877 @@ +# Release rayon 1.8.0 / rayon-core 1.12.0 (2023-09-20) + +- The minimum supported `rustc` is now 1.63. +- Added `ThreadPoolBuilder::use_current_thread` to use the builder thread as + part of the new thread pool. That thread does not run the pool's main loop, + but it may participate in work-stealing if it yields to rayon in some way. +- Implemented `FromParallelIterator<T>` for `Box<[T]>`, `Rc<[T]>`, and + `Arc<[T]>`, as well as `FromParallelIterator<Box<str>>` and + `ParallelExtend<Box<str>>` for `String`. +- `ThreadPoolBuilder::build_scoped` now uses `std::thread::scope`. +- The default number of threads is now determined using + `std::thread::available_parallelism` instead of the `num_cpus` crate. +- The internal logging facility has been removed, reducing bloat for all users. +- Many smaller performance tweaks and documentation updates. + +# Release rayon 1.7.0 / rayon-core 1.11.0 (2023-03-03) + +- The minimum supported `rustc` is now 1.59. +- Added a fallback when threading is unsupported. +- The new `ParallelIterator::take_any` and `skip_any` methods work like + unordered `IndexedParallelIterator::take` and `skip`, counting items in + whatever order they are visited in parallel. +- The new `ParallelIterator::take_any_while` and `skip_any_while` methods work + like unordered `Iterator::take_while` and `skip_while`, which previously had + no parallel equivalent. The "while" condition may be satisfied from anywhere + in the parallel iterator, affecting all future items regardless of position. +- The new `yield_now` and `yield_local` functions will cooperatively yield + execution to Rayon, either trying to execute pending work from the entire + pool or from just the local deques of the current thread, respectively. + +# Release rayon-core 1.10.2 (2023-01-22) + +- Fixed miri-reported UB for SharedReadOnly tags protected by a call. + +# Release rayon 1.6.1 (2022-12-09) + +- Simplified `par_bridge` to only pull one item at a time from the iterator, + without batching. Threads that are waiting for iterator items will now block + appropriately rather than spinning CPU. (Thanks @njaard!) +- Added protection against recursion in `par_bridge`, so iterators that also + invoke rayon will not cause mutex recursion deadlocks. + +# Release rayon-core 1.10.1 (2022-11-18) + +- Fixed a race condition with threads going to sleep while a broadcast starts. + +# Release rayon 1.6.0 / rayon-core 1.10.0 (2022-11-18) + +- The minimum supported `rustc` is now 1.56. +- The new `IndexedParallelIterator::fold_chunks` and `fold_chunks_with` methods + work like `ParallelIterator::fold` and `fold_with` with fixed-size chunks of + items. This may be useful for predictable batching performance, without the + allocation overhead of `IndexedParallelIterator::chunks`. +- New "broadcast" methods run a given function on all threads in the pool. + These run at a sort of reduced priority after each thread has exhausted their + local work queue, but before they attempt work-stealing from other threads. + - The global `broadcast` function and `ThreadPool::broadcast` method will + block until completion, returning a `Vec` of all return values. + - The global `spawn_broadcast` function and methods on `ThreadPool`, `Scope`, + and `ScopeFifo` will run detached, without blocking the current thread. +- Panicking methods now use `#[track_caller]` to report the caller's location. +- Fixed a truncated length in `vec::Drain` when given an empty range. + +## Contributors + +Thanks to all of the contributors for this release! + +- @cuviper +- @idanmuze +- @JoeyBF +- @JustForFun88 +- @kianmeng +- @kornelski +- @ritchie46 +- @ryanrussell +- @steffahn +- @TheIronBorn +- @willcrozi + +# Release rayon 1.5.3 (2022-05-13) + +- The new `ParallelSliceMut::par_sort_by_cached_key` is a stable sort that caches + the keys for each item -- a parallel version of `slice::sort_by_cached_key`. + +# Release rayon-core 1.9.3 (2022-05-13) + +- Fixed a use-after-free race in job notification. + +# Release rayon 1.5.2 / rayon-core 1.9.2 (2022-04-13) + +- The new `ParallelSlice::par_rchunks()` and `par_rchunks_exact()` iterate + slice chunks in reverse, aligned the against the end of the slice if the + length is not a perfect multiple of the chunk size. The new + `ParallelSliceMut::par_rchunks_mut()` and `par_rchunks_exact_mut()` are the + same for mutable slices. +- The `ParallelIterator::try_*` methods now support `std::ops::ControlFlow` and + `std::task::Poll` items, mirroring the unstable `Try` implementations in the + standard library. +- The `ParallelString` pattern-based methods now support `&[char]` patterns, + which match when any character in that slice is found in the string. +- A soft limit is now enforced on the number of threads allowed in a single + thread pool, respecting internal bit limits that already existed. The current + maximum is publicly available from the new function `max_num_threads()`. +- Fixed several Stacked Borrow and provenance issues found by `cargo miri`. + +## Contributors + +Thanks to all of the contributors for this release! + +- @atouchet +- @bluss +- @cuviper +- @fzyzcjy +- @nyanzebra +- @paolobarbolini +- @RReverser +- @saethlin + +# Release rayon 1.5.1 / rayon-core 1.9.1 (2021-05-18) + +- The new `in_place_scope` and `in_place_scope_fifo` are variations of `scope` + and `scope_fifo`, running the initial non-`Send` callback directly on the + current thread, rather than moving execution to the thread pool. +- With Rust 1.51 or later, arrays now implement `IntoParallelIterator`. +- New implementations of `FromParallelIterator` make it possible to `collect` + complicated nestings of items. + - `FromParallelIterator<(A, B)> for (FromA, FromB)` works like `unzip`. + - `FromParallelIterator<Either<L, R>> for (A, B)` works like `partition_map`. +- Type inference now works better with parallel `Range` and `RangeInclusive`. +- The implementation of `FromParallelIterator` and `ParallelExtend` for + `Vec<T>` now uses `MaybeUninit<T>` internally to avoid creating any + references to uninitialized data. +- `ParallelBridge` fixed a bug with threads missing available work. + +## Contributors + +Thanks to all of the contributors for this release! + +- @atouchet +- @cuviper +- @Hywan +- @iRaiko +- @Qwaz +- @rocallahan + +# Release rayon 1.5.0 / rayon-core 1.9.0 (2020-10-21) + +- Update crossbeam dependencies. +- The minimum supported `rustc` is now 1.36. + +## Contributors + +Thanks to all of the contributors for this release! + +- @cuviper +- @mbrubeck +- @mrksu + +# Release rayon 1.4.1 (2020-09-29) + +- The new `flat_map_iter` and `flatten_iter` methods can be used to flatten + sequential iterators, which may perform better in cases that don't need the + nested parallelism of `flat_map` and `flatten`. +- The new `par_drain` method is a parallel version of the standard `drain` for + collections, removing items while keeping the original capacity. Collections + that implement this through `ParallelDrainRange` support draining items from + arbitrary index ranges, while `ParallelDrainFull` always drains everything. +- The new `positions` method finds all items that match the given predicate and + returns their indices in a new iterator. + +# Release rayon-core 1.8.1 (2020-09-17) + +- Fixed an overflow panic on high-contention workloads, for a counter that was + meant to simply wrap. This panic only occurred with debug assertions enabled, + and was much more likely on 32-bit targets. + +# Release rayon 1.4.0 / rayon-core 1.8.0 (2020-08-24) + +- Implemented a new thread scheduler, [RFC 5], which uses targeted wakeups for + new work and for notifications of completed stolen work, reducing wasteful + CPU usage in idle threads. +- Implemented `IntoParallelIterator for Range<char>` and `RangeInclusive<char>` + with the same iteration semantics as Rust 1.45. +- Relaxed the lifetime requirements of the initial `scope` closure. + +[RFC 5]: https://github.com/rayon-rs/rfcs/pull/5 + +## Contributors + +Thanks to all of the contributors for this release! + +- @CAD97 +- @cuviper +- @kmaork +- @nikomatsakis +- @SuperFluffy + + +# Release rayon 1.3.1 / rayon-core 1.7.1 (2020-06-15) + +- Fixed a use-after-free race in calls blocked between two rayon thread pools. +- Collecting to an indexed `Vec` now drops any partial writes while unwinding, + rather than just leaking them. If dropping also panics, Rust will abort. + - Note: the old leaking behavior is considered _safe_, just not ideal. +- The new `IndexedParallelIterator::step_by()` adapts an iterator to step + through items by the given count, like `Iterator::step_by()`. +- The new `ParallelSlice::par_chunks_exact()` and mutable equivalent + `ParallelSliceMut::par_chunks_exact_mut()` ensure that the chunks always have + the exact length requested, leaving any remainder separate, like the slice + methods `chunks_exact()` and `chunks_exact_mut()`. + +## Contributors + +Thanks to all of the contributors for this release! + +- @adrian5 +- @bluss +- @cuviper +- @FlyingCanoe +- @GuillaumeGomez +- @matthiasbeyer +- @picoHz +- @zesterer + + +# Release rayon 1.3.0 / rayon-core 1.7.0 (2019-12-21) + +- Tuples up to length 12 now implement `IntoParallelIterator`, creating a + `MultiZip` iterator that produces items as similarly-shaped tuples. +- The `--cfg=rayon_unstable` supporting code for `rayon-futures` is removed. +- The minimum supported `rustc` is now 1.31. + +## Contributors + +Thanks to all of the contributors for this release! + +- @cuviper +- @c410-f3r +- @silwol + + +# Release rayon-futures 0.1.1 (2019-12-21) + +- `Send` bounds have been added for the `Item` and `Error` associated types on + all generic `F: Future` interfaces. While technically a breaking change, this + is a soundness fix, so we are not increasing the semantic version for this. +- This crate is now deprecated, and the `--cfg=rayon_unstable` supporting code + will be removed in `rayon-core 1.7.0`. This only supported the now-obsolete + `Future` from `futures 0.1`, while support for `std::future::Future` is + expected to come directly in `rayon-core` -- although that is not ready yet. + +## Contributors + +Thanks to all of the contributors for this release! + +- @cuviper +- @kornelski +- @jClaireCodesStuff +- @jwass +- @seanchen1991 + + +# Release rayon 1.2.1 / rayon-core 1.6.1 (2019-11-20) + +- Update crossbeam dependencies. +- Add top-level doc links for the iterator traits. +- Document that the iterator traits are not object safe. + +## Contributors + +Thanks to all of the contributors for this release! + +- @cuviper +- @dnaka91 +- @matklad +- @nikomatsakis +- @Qqwy +- @vorner + + +# Release rayon 1.2.0 / rayon-core 1.6.0 (2019-08-30) + +- The new `ParallelIterator::copied()` converts an iterator of references into + copied values, like `Iterator::copied()`. +- `ParallelExtend` is now implemented for the unit `()`. +- Internal updates were made to improve test determinism, reduce closure type + sizes, reduce task allocations, and update dependencies. +- The minimum supported `rustc` is now 1.28. + +## Contributors + +Thanks to all of the contributors for this release! + +- @Aaron1011 +- @cuviper +- @ralfbiedert + + +# Release rayon 1.1.0 / rayon-core 1.5.0 (2019-06-12) + +- FIFO spawns are now supported using the new `spawn_fifo()` and `scope_fifo()` + global functions, and their corresponding `ThreadPool` methods. + - Normally when tasks are queued on a thread, the most recent is processed + first (LIFO) while other threads will steal the oldest (FIFO). With FIFO + spawns, those tasks are processed locally in FIFO order too. + - Regular spawns and other tasks like `join` are not affected. + - The `breadth_first` configuration flag, which globally approximated this + effect, is now deprecated. + - For more design details, please see [RFC 1]. +- `ThreadPoolBuilder` can now take a custom `spawn_handler` to control how + threads will be created in the pool. + - `ThreadPoolBuilder::build_scoped()` uses this to create a scoped thread + pool, where the threads are able to use non-static data. + - This may also be used to support threading in exotic environments, like + WebAssembly, which don't support the normal `std::thread`. +- `ParallelIterator` has 3 new methods: `find_map_any()`, `find_map_first()`, + and `find_map_last()`, like `Iterator::find_map()` with ordering constraints. +- The new `ParallelIterator::panic_fuse()` makes a parallel iterator halt as soon + as possible if any of its threads panic. Otherwise, the panic state is not + usually noticed until the iterator joins its parallel tasks back together. +- `IntoParallelIterator` is now implemented for integral `RangeInclusive`. +- Several internal `Folder`s now have optimized `consume_iter` implementations. +- `rayon_core::current_thread_index()` is now re-exported in `rayon`. +- The minimum `rustc` is now 1.26, following the update policy defined in [RFC 3]. + +## Contributors + +Thanks to all of the contributors for this release! + +- @cuviper +- @didroe +- @GuillaumeGomez +- @huonw +- @janriemer +- @kornelski +- @nikomatsakis +- @seanchen1991 +- @yegeun542 + +[RFC 1]: https://github.com/rayon-rs/rfcs/blob/master/accepted/rfc0001-scope-scheduling.md +[RFC 3]: https://github.com/rayon-rs/rfcs/blob/master/accepted/rfc0003-minimum-rustc.md + + +# Release rayon 1.0.3 (2018-11-02) + +- `ParallelExtend` is now implemented for tuple pairs, enabling nested + `unzip()` and `partition_map()` operations. For instance, `(A, (B, C))` + items can be unzipped into `(Vec<A>, (Vec<B>, Vec<C>))`. + - `ParallelExtend<(A, B)>` works like `unzip()`. + - `ParallelExtend<Either<A, B>>` works like `partition_map()`. +- `ParallelIterator` now has a method `map_init()` which calls an `init` + function for a value to pair with items, like `map_with()` but dynamically + constructed. That value type has no constraints, not even `Send` or `Sync`. + - The new `for_each_init()` is a variant of this for simple iteration. + - The new `try_for_each_init()` is a variant for fallible iteration. + +## Contributors + +Thanks to all of the contributors for this release! + +- @cuviper +- @dan-zheng +- @dholbert +- @ignatenkobrain +- @mdonoughe + + +# Release rayon 1.0.2 / rayon-core 1.4.1 (2018-07-17) + +- The `ParallelBridge` trait with method `par_bridge()` makes it possible to + use any `Send`able `Iterator` in parallel! + - This trait has been added to `rayon::prelude`. + - It automatically implements internal synchronization and queueing to + spread the `Item`s across the thread pool. Iteration order is not + preserved by this adaptor. + - "Native" Rayon iterators like `par_iter()` should still be preferred when + possible for better efficiency. +- `ParallelString` now has additional methods for parity with `std` string + iterators: `par_char_indices()`, `par_bytes()`, `par_encode_utf16()`, + `par_matches()`, and `par_match_indices()`. +- `ParallelIterator` now has fallible methods `try_fold()`, `try_reduce()`, + and `try_for_each`, plus `*_with()` variants of each, for automatically + short-circuiting iterators on `None` or `Err` values. These are inspired by + `Iterator::try_fold()` and `try_for_each()` that were stabilized in Rust 1.27. +- `Range<i128>` and `Range<u128>` are now supported with Rust 1.26 and later. +- Small improvements have been made to the documentation. +- `rayon-core` now only depends on `rand` for testing. +- Rayon tests now work on stable Rust. + +## Contributors + +Thanks to all of the contributors for this release! + +- @AndyGauge +- @cuviper +- @ignatenkobrain +- @LukasKalbertodt +- @MajorBreakfast +- @nikomatsakis +- @paulkernfeld +- @QuietMisdreavus + + +# Release rayon 1.0.1 (2018-03-16) + +- Added more documentation for `rayon::iter::split()`. +- Corrected links and typos in documentation. + +## Contributors + +Thanks to all of the contributors for this release! + +- @cuviper +- @HadrienG2 +- @matthiasbeyer +- @nikomatsakis + + +# Release rayon 1.0.0 / rayon-core 1.4.0 (2018-02-15) + +- `ParallelIterator` added the `update` method which applies a function to + mutable references, inspired by `itertools`. +- `IndexedParallelIterator` added the `chunks` method which yields vectors of + consecutive items from the base iterator, inspired by `itertools`. +- `String` now implements `FromParallelIterator<Cow<str>>` and + `ParallelExtend<Cow<str>>`, inspired by `std`. +- `()` now implements `FromParallelIterator<()>`, inspired by `std`. +- The new `ThreadPoolBuilder` replaces and deprecates `Configuration`. + - Errors from initialization now have the concrete `ThreadPoolBuildError` + type, rather than `Box<Error>`, and this type implements `Send` and `Sync`. + - `ThreadPool::new` is deprecated in favor of `ThreadPoolBuilder::build`. + - `initialize` is deprecated in favor of `ThreadPoolBuilder::build_global`. +- Examples have been added to most of the parallel iterator methods. +- A lot of the documentation has been reorganized and extended. + +## Breaking changes + +- Rayon now requires rustc 1.13 or greater. +- `IndexedParallelIterator::len` and `ParallelIterator::opt_len` now operate on + `&self` instead of `&mut self`. +- `IndexedParallelIterator::collect_into` is now `collect_into_vec`. +- `IndexedParallelIterator::unzip_into` is now `unzip_into_vecs`. +- Rayon no longer exports the deprecated `Configuration` and `initialize` from + rayon-core. + +## Contributors + +Thanks to all of the contributors for this release! + +- @Bilkow +- @cuviper +- @Enet4 +- @ignatenkobrain +- @iwillspeak +- @jeehoonkang +- @jwass +- @Kerollmops +- @KodrAus +- @kornelski +- @MaloJaffre +- @nikomatsakis +- @obv-mikhail +- @oddg +- @phimuemue +- @stjepang +- @tmccombs +- bors[bot] + + +# Release rayon 0.9.0 / rayon-core 1.3.0 / rayon-futures 0.1.0 (2017-11-09) + +- `Configuration` now has a `build` method. +- `ParallelIterator` added `flatten` and `intersperse`, both inspired by + itertools. +- `IndexedParallelIterator` added `interleave`, `interleave_shortest`, and + `zip_eq`, all inspired by itertools. +- The new functions `iter::empty` and `once` create parallel iterators of + exactly zero or one item, like their `std` counterparts. +- The new functions `iter::repeat` and `repeatn` create parallel iterators + repeating an item indefinitely or `n` times, respectively. +- The new function `join_context` works like `join`, with an added `FnContext` + parameter that indicates whether the job was stolen. +- `Either` (used by `ParallelIterator::partition_map`) is now re-exported from + the `either` crate, instead of defining our own type. + - `Either` also now implements `ParallelIterator`, `IndexedParallelIterator`, + and `ParallelExtend` when both of its `Left` and `Right` types do. +- All public types now implement `Debug`. +- Many of the parallel iterators now implement `Clone` where possible. +- Much of the documentation has been extended. (but still could use more help!) +- All rayon crates have improved metadata. +- Rayon was evaluated in the Libz Blitz, leading to many of these improvements. +- Rayon pull requests are now guarded by bors-ng. + +## Futures + +The `spawn_future()` method has been refactored into its own `rayon-futures` +crate, now through a `ScopeFutureExt` trait for `ThreadPool` and `Scope`. The +supporting `rayon-core` APIs are still gated by `--cfg rayon_unstable`. + +## Breaking changes + +- Two breaking changes have been made to `rayon-core`, but since they're fixing + soundness bugs, we are considering these _minor_ changes for semver. + - `Scope::spawn` now requires `Send` for the closure. + - `ThreadPool::install` now requires `Send` for the return value. +- The `iter::internal` module has been renamed to `iter::plumbing`, to hopefully + indicate that while these are low-level details, they're not really internal + or private to rayon. The contents of that module are needed for third-parties + to implement new parallel iterators, and we'll treat them with normal semver + stability guarantees. +- The function `rayon::iter::split` is no longer re-exported as `rayon::split`. + +## Contributors + +Thanks to all of the contributors for this release! + +- @AndyGauge +- @ChristopherDavenport +- @chrisvittal +- @cuviper +- @dns2utf8 +- @dtolnay +- @frewsxcv +- @gsquire +- @Hittherhod +- @jdr023 +- @laumann +- @leodasvacas +- @lvillani +- @MajorBreakfast +- @mamuleanu +- @marmistrz +- @mbrubeck +- @mgattozzi +- @nikomatsakis +- @smt923 +- @stjepang +- @tmccombs +- @vishalsodani +- bors[bot] + + +# Release rayon 0.8.2 (2017-06-28) + +- `ParallelSliceMut` now has six parallel sorting methods with the same + variations as the standard library. + - `par_sort`, `par_sort_by`, and `par_sort_by_key` perform stable sorts in + parallel, using the default order, a custom comparator, or a key extraction + function, respectively. + - `par_sort_unstable`, `par_sort_unstable_by`, and `par_sort_unstable_by_key` + perform unstable sorts with the same comparison options. + - Thanks to @stjepang! + + +# Release rayon 0.8.1 / rayon-core 1.2.0 (2017-06-14) + +- The following core APIs are being stabilized: + - `rayon::spawn()` -- spawns a task into the Rayon threadpool; as it + is contained in the global scope (rather than a user-created + scope), the task cannot capture anything from the current stack + frame. + - `ThreadPool::join()`, `ThreadPool::spawn()`, `ThreadPool::scope()` + -- convenience APIs for launching new work within a thread-pool. +- The various iterator adapters are now tagged with `#[must_use]` +- Parallel iterators now offer a `for_each_with` adapter, similar to + `map_with`. +- We are adopting a new approach to handling the remaining unstable + APIs (which primarily pertain to futures integration). As awlays, + unstable APIs are intended for experimentation, but do not come with + any promise of compatibility (in other words, we might change them + in arbitrary ways in any release). Previously, we designated such + APIs using a Cargo feature "unstable". Now, we are using a regular + `#[cfg]` flag. This means that to see the unstable APIs, you must do + `RUSTFLAGS='--cfg rayon_unstable' cargo build`. This is + intentionally inconvenient; in particular, if you are a library, + then your clients must also modify their environment, signaling + their agreement to instability. + + +# Release rayon 0.8.0 / rayon-core 1.1.0 (2017-06-13) + +## Rayon 0.8.0 + +- Added the `map_with` and `fold_with` combinators, which help for + passing along state (like channels) that cannot be shared between + threads but which can be cloned on each thread split. +- Added the `while_some` combinator, which helps for writing short-circuiting iterators. +- Added support for "short-circuiting" collection: e.g., collecting + from an iterator producing `Option<T>` or `Result<T, E>` into a + `Option<Collection<T>>` or `Result<Collection<T>, E>`. +- Support `FromParallelIterator` for `Cow`. +- Removed the deprecated weight APIs. +- Simplified the parallel iterator trait hierarchy by removing the + `BoundedParallelIterator` and `ExactParallelIterator` traits, + which were not serving much purpose. +- Improved documentation. +- Added some missing `Send` impls. +- Fixed some small bugs. + +## Rayon-core 1.1.0 + +- We now have more documentation. +- Renamed the (unstable) methods `spawn_async` and + `spawn_future_async` -- which spawn tasks that cannot hold + references -- to simply `spawn` and `spawn_future`, respectively. +- We are now using the coco library for our deque. +- Individual threadpools can now be configured in "breadth-first" + mode, which causes them to execute spawned tasks in the reverse + order that they used to. In some specific scenarios, this can be a + win (though it is not generally the right choice). +- Added top-level functions: + - `current_thread_index`, for querying the index of the current worker thread within + its thread-pool (previously available as `thread_pool.current_thread_index()`); + - `current_thread_has_pending_tasks`, for querying whether the + current worker that has an empty task deque or not. This can be + useful when deciding whether to spawn a task. +- The environment variables for controlling Rayon are now + `RAYON_NUM_THREADS` and `RAYON_LOG`. The older variables (e.g., + `RAYON_RS_NUM_CPUS` are still supported but deprecated). + +## Rayon-demo + +- Added a new game-of-life benchmark. + +## Contributors + +Thanks to the following contributors: + +- @ChristopherDavenport +- @SuperFluffy +- @antoinewdg +- @crazymykl +- @cuviper +- @glandium +- @julian-seward1 +- @leodasvacas +- @leshow +- @lilianmoraru +- @mschmo +- @nikomatsakis +- @stjepang + + +# Release rayon 0.7.1 / rayon-core 1.0.2 (2017-05-30) + +This release is a targeted performance fix for #343, an issue where +rayon threads could sometimes enter into a spin loop where they would +be unable to make progress until they are pre-empted. + + +# Release rayon 0.7 / rayon-core 1.0 (2017-04-06) + +This release marks the first step towards Rayon 1.0. **For best +performance, it is important that all Rayon users update to at least +Rayon 0.7.** This is because, as of Rayon 0.7, we have taken steps to +ensure that, no matter how many versions of rayon are actively in use, +there will only be a single global scheduler. This is achieved via the +`rayon-core` crate, which is being released at version 1.0, and which +encapsulates the core schedule APIs like `join()`. (Note: the +`rayon-core` crate is, to some degree, an implementation detail, and +not intended to be imported directly; it's entire API surface is +mirrored through the rayon crate.) + +We have also done a lot of work reorganizing the API for Rayon 0.7 in +preparation for 1.0. The names of iterator types have been changed and +reorganized (but few users are expected to be naming those types +explicitly anyhow). In addition, a number of parallel iterator methods +have been adjusted to match those in the standard iterator traits more +closely. See the "Breaking Changes" section below for +details. + +Finally, Rayon 0.7 includes a number of new features and new parallel +iterator methods. **As of this release, Rayon's parallel iterators +have officially reached parity with sequential iterators** -- that is, +every sequential iterator method that makes any sense in parallel is +supported in some capacity. + +### New features and methods + +- The internal `Producer` trait now features `fold_with`, which enables + better performance for some parallel iterators. +- Strings now support `par_split()` and `par_split_whitespace()`. +- The `Configuration` API is expanded and simplified: + - `num_threads(0)` no longer triggers an error + - you can now supply a closure to name the Rayon threads that get created + by using `Configuration::thread_name`. + - you can now inject code when Rayon threads start up and finish + - you can now set a custom panic handler to handle panics in various odd situations +- Threadpools are now able to more gracefully put threads to sleep when not needed. +- Parallel iterators now support `find_first()`, `find_last()`, `position_first()`, + and `position_last()`. +- Parallel iterators now support `rev()`, which primarily affects subsequent calls + to `enumerate()`. +- The `scope()` API is now considered stable (and part of `rayon-core`). +- There is now a useful `rayon::split` function for creating custom + Rayon parallel iterators. +- Parallel iterators now allow you to customize the min/max number of + items to be processed in a given thread. This mechanism replaces the + older `weight` mechanism, which is deprecated. +- `sum()` and friends now use the standard `Sum` traits + +### Breaking changes + +In the move towards 1.0, there have been a number of minor breaking changes: + +- Configuration setters like `Configuration::set_num_threads()` lost the `set_` prefix, + and hence become something like `Configuration::num_threads()`. +- `Configuration` getters are removed +- Iterator types have been shuffled around and exposed more consistently: + - combinator types live in `rayon::iter`, e.g. `rayon::iter::Filter` + - iterators over various types live in a module named after their type, + e.g. `rayon::slice::Windows` +- When doing a `sum()` or `product()`, type annotations are needed for the result + since it is now possible to have the resulting sum be of a type other than the value + you are iterating over (this mirrors sequential iterators). + +### Experimental features + +Experimental features require the use of the `unstable` feature. Their +APIs may change or disappear entirely in future releases (even minor +releases) and hence they should be avoided for production code. + +- We now have (unstable) support for futures integration. You can use + `Scope::spawn_future` or `rayon::spawn_future_async()`. +- There is now a `rayon::spawn_async()` function for using the Rayon + threadpool to run tasks that do not have references to the stack. + +### Contributors + +Thanks to the following people for their contributions to this release: + +- @Aaronepower +- @ChristopherDavenport +- @bluss +- @cuviper +- @froydnj +- @gaurikholkar +- @hniksic +- @leodasvacas +- @leshow +- @martinhath +- @mbrubeck +- @nikomatsakis +- @pegomes +- @schuster +- @torkleyy + + +# Release 0.6 (2016-12-21) + +This release includes a lot of progress towards the goal of parity +with the sequential iterator API, though there are still a few methods +that are not yet complete. If you'd like to help with that effort, +[check out the milestone](https://github.com/rayon-rs/rayon/issues?q=is%3Aopen+is%3Aissue+milestone%3A%22Parity+with+the+%60Iterator%60+trait%22) +to see the remaining issues. + +**Announcement:** @cuviper has been added as a collaborator to the +Rayon repository for all of his outstanding work on Rayon, which +includes both internal refactoring and helping to shape the public +API. Thanks @cuviper! Keep it up. + +- We now support `collect()` and not just `collect_with()`. + You can use `collect()` to build a number of collections, + including vectors, maps, and sets. Moreover, when building a vector + with `collect()`, you are no longer limited to exact parallel iterators. + Thanks @nikomatsakis, @cuviper! +- We now support `skip()` and `take()` on parallel iterators. + Thanks @martinhath! +- **Breaking change:** We now match the sequential APIs for `min()` and `max()`. + We also support `min_by_key()` and `max_by_key()`. Thanks @tapeinosyne! +- **Breaking change:** The `mul()` method is now renamed to `product()`, + to match sequential iterators. Thanks @jonathandturner! +- We now support parallel iterator over ranges on `u64` values. Thanks @cuviper! +- We now offer a `par_chars()` method on strings for iterating over characters + in parallel. Thanks @cuviper! +- We now have new demos: a traveling salesman problem solver as well as matrix + multiplication. Thanks @nikomatsakis, @edre! +- We are now documenting our minimum rustc requirement (currently + v1.12.0). We will attempt to maintain compatibility with rustc + stable v1.12.0 as long as it remains convenient, but if new features + are stabilized or added that would be helpful to Rayon, or there are + bug fixes that we need, we will bump to the most recent rustc. Thanks @cuviper! +- The `reduce()` functionality now has better inlining. + Thanks @bluss! +- The `join()` function now has some documentation. Thanks @gsquire! +- The project source has now been fully run through rustfmt. + Thanks @ChristopherDavenport! +- Exposed helper methods for accessing the current thread index. + Thanks @bholley! + + +# Release 0.5 (2016-11-04) + +- **Breaking change:** The `reduce` method has been vastly + simplified, and `reduce_with_identity` has been deprecated. +- **Breaking change:** The `fold` method has been changed. It used to + always reduce the values, but now instead it is a combinator that + returns a parallel iterator which can itself be reduced. See the + docs for more information. +- The following parallel iterator combinators are now available (thanks @cuviper!): + - `find_any()`: similar to `find` on a sequential iterator, + but doesn't necessarily return the *first* matching item + - `position_any()`: similar to `position` on a sequential iterator, + but doesn't necessarily return the index of *first* matching item + - `any()`, `all()`: just like their sequential counterparts +- The `count()` combinator is now available for parallel iterators. +- We now build with older versions of rustc again (thanks @durango!), + as we removed a stray semicolon from `thread_local!`. +- Various improvements to the (unstable) `scope()` API implementation. + + +# Release 0.4.3 (2016-10-25) + +- Parallel iterators now offer an adaptive weight scheme, + which means that explicit weights should no longer + be necessary in most cases! Thanks @cuviper! + - We are considering removing weights or changing the weight mechanism + before 1.0. Examples of scenarios where you still need weights even + with this adaptive mechanism would be great. Join the discussion + at <https://github.com/rayon-rs/rayon/issues/111>. +- New (unstable) scoped threads API, see `rayon::scope` for details. + - You will need to supply the [cargo feature] `unstable`. +- The various demos and benchmarks have been consolidated into one + program, `rayon-demo`. +- Optimizations in Rayon's inner workings. Thanks @emilio! +- Update `num_cpus` to 1.0. Thanks @jamwt! +- Various internal cleanup in the implementation and typo fixes. + Thanks @cuviper, @Eh2406, and @spacejam! + +[cargo feature]: https://doc.rust-lang.org/cargo/reference/features.html#the-features-section + + +# Release 0.4.2 (2016-09-15) + +- Updated crates.io metadata. + + +# Release 0.4.1 (2016-09-14) + +- New `chain` combinator for parallel iterators. +- `Option`, `Result`, as well as many more collection types now have + parallel iterators. +- New mergesort demo. +- Misc fixes. + +Thanks to @cuviper, @edre, @jdanford, @frewsxcv for their contributions! + + +# Release 0.4 (2016-05-16) + +- Make use of latest versions of catch-panic and various fixes to panic propagation. +- Add new prime sieve demo. +- Add `cloned()` and `inspect()` combinators. +- Misc fixes for Rust RFC 1214. + +Thanks to @areilb1, @Amanieu, @SharplEr, and @cuviper for their contributions! + + +# Release 0.3 (2016-02-23) + +- Expanded `par_iter` APIs now available: + - `into_par_iter` is now supported on vectors (taking ownership of the elements) +- Panic handling is much improved: + - if you use the Nightly feature, experimental panic recovery is available + - otherwise, panics propagate out and poision the workpool +- New `Configuration` object to control number of threads and other details +- New demos and benchmarks + - try `cargo run --release -- visualize` in `demo/nbody` :) + - Note: a nightly compiler is required for this demo due to the + use of the `+=` syntax + +Thanks to @bjz, @cuviper, @Amanieu, and @willi-kappler for their contributions! + + +# Release 0.2 and earlier + +No release notes were being kept at this time. |