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digitalmars.D.bugs - [Issue 22998] New: Update to zlib 1.2.12


          Issue ID: 22998
           Summary: Update to zlib 1.2.12
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody puremagic.com
          Reporter: bcallah openbsd.org

Hello --

I've updated the copy of zlib in Phobos.

Here's a reprinting of the big-ticket items from the zlib.net homepage:
Version 1.2.12 has these key improvements over 1.2.11:

* Fix a deflate bug when using the Z_FIXED strategy that can result in
out-of-bound accesses.
* Fix a deflate bug when the window is full in deflate_stored().
* Speed up CRC-32 computations by a factor of 1.5 to 3.
* Use the hardware CRC-32 instruction on ARMv8 processors.
* Speed up crc32_combine() with powers of x tables.
* Add crc32_combine_gen() and crc32_combine_op() for fast combines.
Due to the bug fixes, any installations of 1.2.11 should be replaced with

Also maintains the fix from here:

Everything appears OK on my OpenBSD/amd64 machine. But perhaps more testing
from others is in order.

Apr 09 2022