Announcing Chapel version 1.15!

[Brad C. <br...@cr...>]

Hi Chapel community --

Cray Inc. and the Chapel open-source community are proud to announce
that version 1.15 of Chapel has been released today!  This is Chapel's
strongest release ever, and includes the following highlights:

* significant performance improvements, particularly for:
   - task creation speed and overheads
   - array operations like slicing, rank-change, and reindexing
   - multi-locale codes whose scalability and performance improved
   - latency-bound applications on Crays

* expansions to our standard library and package modules, including:
   - a new module for operating on dates and times ('DateTime')
   - extensions to the 'BLAS' module to include level 1 and 2 routines
   - an early draft 'LinearAlgebra' module
   - 'Owned' and 'Shared' record types to help with class memory management
   - a new 'Futures' module supporting library-based futures

* improvements to the language and its implementation, including:
   - significantly improved array semantics and memory management
   - a new 'void' type that supports folding variables and arguments away
   - module-level deinit() functions
   - 'forwarding' fields that support delegation of method calls
   - support for numa-localization of array memory
   - significant improvements to object initializers and deinitializers
   - a preview of Chapel's emerging error-handling features

* portability improvements for a few platforms:
   - a new Intel Xeon Phi "KNL" locale model supporting its distinct memories
   - AWS EC2 support
   - support for the Windows 10 bash shell, similar to Ubuntu
   - improved support for ARM processors, including multi-locale support

* other miscellaneous improvements:
   - new users guide sections on promotion, constants, type aliases, configs
   - a switch to GitHub issues to report and track bugs and feature requests
   - the open-sourcing of the 'ugni' runtime communication layer

And of course, Chapel 1.15 contains numerous bug fixes, documentation
improvements, and feature enhancements.  To see a far more complete
list of its changes, refer to CHANGES.md within the release or online:

   https://github.com/chapel-lang/chapel/blob/release/1.15/CHANGES.md

To download and install the release, see:

    http://chapel.cray.com/download.html

For a list of those who contributed to the release, refer to:

   https://github.com/chapel-lang/chapel/blob/release/1.15/CONTRIBUTORS.md

As always, we're interested in feedback on how we can make the Chapel
language and implementation more useful to you.

On behalf of the Chapel development team,
-Brad Chamberlain


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