#402 F32 System-Wide Change: mpfr-4.0
Closed 2 years ago by pbokoc. Opened 2 years ago by bcotton.

This issue tracks the release note for the following Fedora Change:

https://fedoraproject.org/wiki/Changes/mpfr-4.0.2

If you own this change, please add additional information here that we should communicate to Fedora users. Specifically, please consider:

  • New features available because of this change - pick 2 or 3 that are important
  • Considerations for users of previous releases of Fedora (upgrade issues, format changes, etc.)
  • Links to any upstream Release Notes
  • If this helps Fedora be a superior environment for our target audiences, please explain how so that we can emphasize this.

Your notes to us do not need to be formally written. We will edit them and add details as needed. This is a way for you to ensure that we know what is critical about your change.

If you want to write this release note, then:

  • Assign this issue to yourself
  • Check the wiki page linked above, find out what the change is about
  • Determine whether the change actually made it into the release or not[0]
  • Write a draft release note using that information against the correct branch here, in Pagure. (or see below)
  • Get in touch with the contact person/people listed on the wiki page, either through IRC or e-mail, and ask them to check your draft for technical accuracy
  • Submit your Release Note as a PR to this repository.

Once you're done with the above, make sure to either commit the relnote to an appropriate section of the Release Notes book, or, if you're not familiar with Git, AsciiDoc, or whatever else, just add it to this issue as a comment and let pbokoc[1] know that you're done with this one and you'd like the note included. Be sure to do this at least one day before the final release (October 29 according to the current schedule). Also make sure to do this even for relnotes that haven't been checked by the change owner.

[0] You can do that by asking the change owner listed on the wiki page; alternatively you can infer it by checking the tracker bug (linked in Wiki) in Bugzilla and looking at its status; see bug comments for details. Ask someone on the mailing list or on IRC if you're not sure.
[1] In #fedora-docs on FreeNode (UTC+1 timezone, online mostly during the day on weekdays), or pbokoc @redhat.com if you can't get a hold of me on IRC.


Copied from a duplicate issue:

Upstream release notes applicable to this change:
https://www.mpfr.org/mpfr-4.0.0/#changes
http://www.mpfr.org/mpfr-4.0.1/#changes
http://www.mpfr.org/mpfr-4.0.2/#changes

In my opinion, these are the ones our users are most likely to care about:

  • mpfr now supports shared caches for multithreaded applications, thereby reducing memory usage
  • improved caching: a minimum of 10% increase of the precision is guaranteed to avoid too many recomputations, thereby reducing CPU usage
  • a small-precision mpz_t pool is used to reduce the number of memory allocations, thereby reducing CPU usage
  • several functions are now faster; e.g., mpfr_add, mpfr_sub, mpfr_mul, mpfr_div, mpfr_sqrt, mpfr_set_d, and mpfr_get_d
  • the mpfr_div_ui function could produce incorrectly rounded results in mpfr 3; the bug has been fixed in mpfr 4

This is a Fedora Change since gcc uses mpfr, but most users will not notice the change. I expect that most Fedora users don't even know that mpfr exists.

Metadata Update from @pbokoc:
- Issue assigned to pbokoc

2 years ago

Metadata Update from @pbokoc:
- Issue status updated to: Closed (was: Open)

2 years ago

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