Jump to content

SDCH

Edit links
From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by 2a02:fe0:c130:320:fbb6:a08f:8ddd:456e (talk) at 01:26, 2 May 2017 (Code stripped from Chromium, intent to unship). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

For the Partido Socialdemocracia Chilena, also known by the initials SDCH, see Chilean Social Democracy Party.

SDCH (Shared Dictionary Compression for HTTP) is a data compression algorithm created by Google, based on VCDIFF (RFC 3284). It was supported natively in recent versions of Google Chrome, Chromium and Android, as well as on Google websites.[1][2]

SDCH achieves its effectiveness by using pre-negotiated dictionaries to "warm up" its internal state prior to encoding or decoding. These may either be already stored locally, or uploaded from a source and then cached.

SDCH compression was removed from Google Chrome, and other Chromium products, in version 59.[3]


See also

References

  1. ^ Butler, Jon; Wei-Hsin Lee; McQuade, Bryan; Mixter, Kenneth. "A Proposal for Shared Dictionary Compression Over HTTP" (PDF). Google.
  2. ^ "SDCH Mailing List". Google Groups.
  3. ^ "Intent to Unship: SDCH". Google. Retrieved 2017-05-02.
Stub icon

This Internet-related article is a stub. You can help Wikipedia by expanding it.

Stub icon

This algorithms or data structures-related article is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=SDCH&oldid=778263390"