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1.7 release announcement
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| layout: post | ||
| title: "Announcing Rust 1.7" | ||
| author: The Rust Core Team | ||
| --- | ||
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| The Rust team is happy to announce the latest version of Rust, 1.7. Rust is a | ||
| systems programming language focused on safety, speed, and concurrency. | ||
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| As always, you can [install Rust 1.7][install] from the appropriate page on our | ||
| website, and check out the [detailed release notes for 1.7][notes] on GitHub. | ||
| About 1300 patches were landed in this release. | ||
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| [install]: https://www.rust-lang.org/install.html | ||
| [notes]: https://github.com/rust-lang/rust/blob/stable/RELEASES.md#version-170-2016-03-03 | ||
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| ### What's in 1.7 stable | ||
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| This release is primarily about library features. While we have several | ||
| language features cooking for future releases, the timeframe in which 1.7 was | ||
| developed included the holidays, which means less time for commenting on GitHub | ||
| and more time for spending with loved ones. | ||
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| #### Library stabilizations | ||
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| About 40 library functions and methods are now stable in 1.7. One of the | ||
| largest APIs stabilized was support for custom hash algorithms in the standard | ||
| library’s `HashMap<K, V>` type. Previously all hash maps would use [SipHash] as | ||
| the hashing algorithm, which provides protection against DOS attacks by | ||
| default. SipHash, however, is [not very fast] at hashing small keys. As shown, | ||
| however, the [FNV hash algorithm] is much faster for these size of inputs. This | ||
| means that by switching hash algorithms for types like `HashMap<usize, V>` | ||
| there can be a significant speedup so long as the loss of DOS protection is | ||
| acceptable. | ||
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| [Siphash]: https://en.wikipedia.org/wiki/SipHash | ||
| [not very fast]: http://cglab.ca/~abeinges/blah/hash-rs/ | ||
| [FNV hash algorithm]: https://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function | ||
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| To see this in action, you can check out the [fnv crate] on [crates.io] and | ||
| create a `HashMap` via: | ||
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| ```rust | ||
| extern crate fnv; | ||
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| use std::collections::HashMap; | ||
| use std::hash::BuildHasherDefault; | ||
| use fnv::FnvHasher; | ||
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| type MyHasher = BuildHasherDefault<FnvHasher>; | ||
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| fn main() { | ||
| let mut map: HashMap<_, _, MyHasher> = HashMap::default(); | ||
| map.insert(1, "Hello"); | ||
| map.insert(2, ", world!"); | ||
| println!("{:?}", map); | ||
| } | ||
| ``` | ||
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| [fnv crate]: https://crates.io/crates/fnv | ||
| [crates.io]: https://crates.io | ||
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| Note that most of the time you don’t even need to specify the hasher as type | ||
| inference will take care of it, so `HashMap::default()` should be all you need | ||
| to get up to 2x faster hashes. It’s also worth pointing out that [`Hash`] trait | ||
| is agnostic to the hashing algorithm used, so no changes are needed to the | ||
| types being inserted into hash maps to reap the benefits! | ||
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| [`Hash`]: http://doc.rust-lang.org/std/hash/trait.Hash.html | ||
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| Other notable improvements include: | ||
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| * `<[T]>::clone_from_slice()`, an efficient way to copy the data from one slice | ||
| and put it into another slice. | ||
| * Various convenience methods on `Ipv4Addr` and `Ipv6Addr`, such as `is_loopback()`, | ||
| which returns `true` or `false` if the address is a loopback address according to | ||
| RFC 6890. | ||
| * Various improvements to `CString`, used for FFI. | ||
| * checked, saturated, and overflowing operations for various numeric types. | ||
| These aren’t counted in that ‘40’ number above, because there are a _lot_ of | ||
| them, but they all do the same thing. | ||
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| See the [detailed release notes][notes] for more. | ||
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| #### Cargo features | ||
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| There were a few small updates to Cargo: | ||
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| * An [improvement to build scripts] that allows them to precisely inform Cargo | ||
| about dependences to ensure that they’re only rerun when those files change. | ||
| This should help development quite a bit in repositories with build scripts. | ||
| * A [modification to the `cargo rustc` subcommand], which allows specifying | ||
| profiles to pull in dev-dependencies during testing and such. | ||
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| [improvment to build scripts]: https://github.com/rust-lang/cargo/pull/2279 | ||
| [modification to the `cargo rustc` subcommand]: https://github.com/rust-lang/cargo/pull/2224 | ||
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| ### Contributors to 1.7 | ||
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| We had 144 individuals contribute to 1.7. Thank you so much! | ||
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| * Aaron Turon | ||
| * Adam Perry | ||
| * Adrian Heine | ||
| * Aidan Hobson Sayers | ||
| * Aleksey Kladov | ||
| * Alexander Lopatin | ||
| * Alex Burka | ||
| * Alex Crichton | ||
| * Ali Clark | ||
| * Amanieu d’Antras | ||
| * Andrea Bedini | ||
| * Andrea Canciani | ||
| * Andre Bogus | ||
| * Andrew Barchuk | ||
| * Andrew Paseltiner | ||
| * angelsl | ||
| * Anton Blanchard | ||
| * arcnmx | ||
| * Ariel Ben-Yehuda | ||
| * arthurprs | ||
| * ashleysommer | ||
| * Barosl Lee | ||
| * Benjamin Herr | ||
| * Björn Steinbrink | ||
| * bors | ||
| * Brandon W Maister | ||
| * Brian Anderson | ||
| * Brian Campbell | ||
| * Carlos E. Garcia | ||
| * Chad Shaffer | ||
| * Corey Farwell | ||
| * Daan Sprenkels | ||
| * Daniel Campbell | ||
| * Daniel Robertson | ||
| * Dave Hodder | ||
| * Dave Huseby | ||
| * dileepb | ||
| * Dirk Gadsden | ||
| * Eduard Burtescu | ||
| * Erick Tryzelaar | ||
| * est31 | ||
| * Evan | ||
| * Fabrice Desré | ||
| * fbergr | ||
| * Felix Gruber | ||
| * Felix S. Klock II | ||
| * Florian Hahn | ||
| * Geoff Catlin | ||
| * Geoffrey Thomas | ||
| * Georg Brandl | ||
| * ggomez | ||
| * Gleb Kozyrev | ||
| * Gökhan Karabulut | ||
| * Greg Chapple | ||
| * Guillaume Bonnet | ||
| * Guillaume Gomez | ||
| * Ivan Kozik | ||
| * Jack O’Connor | ||
| * Jeffrey Seyfried | ||
| * Johan Lorenzo | ||
| * Johannes Oertel | ||
| * John Hodge | ||
| * John Kåre Alsaker | ||
| * Jonas Schievink | ||
| * Jonathan Reem | ||
| * Jonathan S | ||
| * Jorge Aparicio | ||
| * Josh Stone | ||
| * Kamal Marhubi | ||
| * Katze | ||
| * Keith Yeung | ||
| * Kenneth Koski | ||
| * Kevin Stock | ||
| * Luke Jones | ||
| * Manish Goregaokar | ||
| * Marc Bowes | ||
| * Marvin Löbel | ||
| * Masood Malekghassemi | ||
| * Matt Brubeck | ||
| * Mátyás Mustoha | ||
| * Michael Huynh | ||
| * Michael Neumann | ||
| * Michael Woerister | ||
| * mitaa | ||
| * mopp | ||
| * Nathan Kleyn | ||
| * Nicholas Mazzuca | ||
| * Nick Cameron | ||
| * Nikita Baksalyar | ||
| * Niko Matsakis | ||
| * NODA, Kai | ||
| * nxnfufunezn | ||
| * Olaf Buddenhagen | ||
| * Oliver ‘ker’ Schneider | ||
| * Oliver Middleton | ||
| * Oliver Schneider | ||
| * Pascal Hertleif | ||
| * Paul Dicker | ||
| * Paul Smith | ||
| * Peter Atashian | ||
| * Peter Kolloch | ||
| * petevine | ||
| * Pierre Krieger | ||
| * Piotr Czarnecki | ||
| * Prayag Verma | ||
| * qpid | ||
| * Ravi Shankar | ||
| * Reeze Xia | ||
| * Richard Bradfield | ||
| * Robin Kruppe | ||
| * rphmeier | ||
| * Ruud van Asseldonk | ||
| * Ryan Thomas | ||
| * Sandeep Datta | ||
| * Scott Olson | ||
| * Scott Whittaker | ||
| * Sean Leffler | ||
| * Sean McArthur | ||
| * Sebastian Hahn | ||
| * Sebastian Wicki | ||
| * Sébastien Marie | ||
| * Seo Sanghyeon | ||
| * Sergey Veselkov | ||
| * Simonas Kazlauskas | ||
| * Simon Sapin | ||
| * Stepan Koltsov | ||
| * Stephan Hügel | ||
| * Steve Klabnik | ||
| * Steven Allen | ||
| * Steven Fackler | ||
| * Tamir Duberstein | ||
| * tgor | ||
| * Thomas Wickham | ||
| * Thomas Winwood | ||
| * Tobias Bucher | ||
| * Tomasz Miąsko | ||
| * tormol | ||
| * Tshepang Lekhonkhobe | ||
| * Ulrik Sverdrup | ||
| * Vadim Petrochenkov | ||
| * Vincent Esche | ||
| * Vlad Ureche | ||
| * Wangshan Lu | ||
| * Wesley Wiser |