[Bug 1932010] Re: [21.10 FEAT] zlib CRC32 optimization for s390x

[Simon Chopin]

Here's a debdiff containing a backported version of the feature. There
is also a small refactoring as it allowed me to easily integrate the new
feature in the build process.

** Changed in: zlib (Ubuntu)
     Assignee: Canonical Foundations Team (canonical-foundations) => Simon Chopin (schopin)

** Changed in: zlib (Ubuntu)
       Status: New => In Progress

** Patch added: "zlib.debdiff"
   https://bugs.launchpad.net/ubuntu/+source/zlib/+bug/1932010/+attachment/5517082/+files/zlib.debdiff

** Information type changed from Private to Public

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https://bugs.launchpad.net/bugs/1932010

Title:
  [21.10 FEAT] zlib CRC32 optimization for s390x

Status in Ubuntu on IBM z Systems:
  Triaged
Status in zlib package in Ubuntu:
  In Progress

Bug description:
  Use SIMD instructions to accelerate the zlib CRC32 implementation.
  Business value: Performance improvement in database area

  The zlib CRC32 optimization for IBM Z is currently being discussed for inclusion into zlib-ng:
  https://github.com/zlib-ng/zlib-ng/pull/912

  The patch for zlib will be based on that.

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