Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Grant Jenks <grant.jenks@gmail.com>
Newsgroups: comp.lang.python.announce
Subject: ANN: DiskCache 4.0.0 Released
Date: Tue, 2 Jul 2019 22:23:38 -0700
Lines: 76
Approved: python-announce-list@python.org
Message-ID: <156260609281.14687.784530612439210119@mail.python.org>
Reply-To: python-list@python.org
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Message-ID-Hash: K4RJJH2BY3ALI2K32JZ7FY2VPZKRLS3P
Precedence: list
Archived-At:  <https://mail.python.org/archives/list/python-announce-list@python.org/message/K4RJJH2BY3ALI2K32JZ7FY2VPZKRLS3P/>
Xref: csiph.com comp.lang.python.announce:3143

Announcing the release of DiskCache version 4.0.0

What is DiskCache?
----

[DiskCache][1] is an Apache2 licensed disk and file backed cache library,
written in pure-Python, and compatible with Django. By leveraging a rock-so=
lid
database library and memory-mapped files, cache performance can match and
exceed industry standard solutions.  There=E2=80=99s no need for a C compil=
er or
running another process. [Performance is a feature][2] and testing has 100%
coverage with unit tests and hours of stress in production.

  [1]: http://www.grantjenks.com/docs/diskcache/
  [2]: http://www.grantjenks.com/docs/diskcache/cache-benchmarks.html


What's new in 4.0.0?
----

* Cache, Deque, and Index data types now support transactions for consisten=
cy
  and improved performance.

* Add memoization with cache-stampede mitigation using probabilistic early
  recomputation based on research by Vattani, et al.

* Published: "Case Study: Landing Page Caching" illustrating memoization wi=
th
  cache-stampede mitigation:
  http://www.grantjenks.com/docs/diskcache/case-study-landing-page-caching.=
html

* Cache methods offer `retry` parameter just like FanoutCache and DjangoCac=
he
  methods.

* Memoization decorator added to Cache, Index, and DjangoCache data types.

* Add peek method to Cache and Deque data types.

* Add peekitem method to Cache and Index data types.

* Add touch method to Cache, FanoutCache, and DjangoCache data types.

* Add Averager data type for calculating a running average across threads a=
nd
  processes.

* Add Lock, RLock, and BoundedSemaphore data types for synchronization acro=
ss
  threads and processes.

* Add throttle decorator to rate-limit calls to a function across threads a=
nd
  processes.

* Add barrier decorator to synchronize calls to a function across threads a=
nd
  processes.

* Developed, benchmarked, and tested on Python 3.7

* Numerous small documentation and performance improvements.


Links
----

- Documentation: http://www.grantjenks.com/docs/diskcache/
- Download: https://pypi.python.org/pypi/diskcache
- Source: https://github.com/grantjenks/python-diskcache
- Issues: https://github.com/grantjenks/python-diskcache/issues

Please upgrade.