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Re: Perl 5.26.0-RC1 is now available!

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Ævar Arnfjörð Bjarmason
May 13, 2017 22:34
Re: Perl 5.26.0-RC1 is now available!
Message ID:
On Thu, May 11, 2017 at 7:21 PM, Sawyer X <> wrote:
> perl-5.26.0's official release will occur on May 20th, 2017, assuming
> all goes well(tm).

As someone with no contributions to this release[1] I thought I was in
a good position to see if the perldelta made sense to someone with no
real idea of what was going on in 5.26.

I've pushed avar/v5.26.0-RC1-perldelta-fixes which has proposed fixes
to the document:

The tip of that branch are a bunch of "TODO perldelta: *" commits
where I don't know what should be said, but think that something
should be clarified/fixed by others who actually know what these
entries are referring to.

I think it would be uncontroversial to push the non-TODO commits to
blead, but haven't because at this stage in the release everything
should probably get reviewed. I'm reproducing the diff of the TODO
commits below for convenience:

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 06f68311fb..c8dc2b81a3 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -82,6 +82,11 @@ C<%{^CAPTURE}> is the equivalent to C<%+> (ie named captures)

 C<%{^CAPTURE_ALL}> is the equivalent to C<%-> (ie all named captures).

+    ^ This really needs a note about what this is actually for. Is it
+    just so you can get an array of all matched params? Why would you
+    use a more verbose synonym like %{^CAPTURE} instead of %+ in your
+    code?
 =head2 Unicode 9.0 is now supported

 A list of changes is at L<>.
@@ -195,6 +200,12 @@ the end of the supplied buffer.
 For security reasons, C<@INC> no longer contains the default directory

+       Why are we mentioning this both here and in the main section
+       (maybe not an issue), but most importantly isn't this wrong?
+       don't we have . in @INC now unless you opt-in via
+       -Ddefault_inc_excludes_dot? If not the main section above
+       needs changing.
 =head2 "Escaped" colons and relative paths in PATH

 On Unix systems, Perl treats any relative paths in the PATH environment
@@ -283,6 +294,9 @@ ones which weren't have been improved.

 Several other ops may now also be faster in boolean context.

+    Could we be a bit less vague here? Arithmetic ops? stuff like
+    print, what?
 =item * New Faster Hash Function on 64 bit builds

 We use a different hash function for short and long keys. This should
@@ -327,6 +341,11 @@ Enhancements in Regex concat COW implementation.

 Speed up C<AV> and C<HV> clearing/undeffing.

+    Does this mean that `undef %h` and `undef @a` are faster, or is it
+    for some reason only the internal XS stuff? If it's the former
+    (which I assume) let's use the more readable forms someone not
+    deep into XS will know about.
 =item *

 Better optimise array and hash assignment
@@ -1634,6 +1653,9 @@ tests for perlbug. [perl #128020]

 C<DEFAULT_INC_EXCLUDES_DOT> has been turned on as default.

+    Again, wasn't this off now by default per the intro section
+    talking about -Ddefault_inc_excludes_dot?
 =item *

 The C<dtrace> build process has further changes:

1. Apparently a sole commit of adding a comment to existing code
landed me in the release notes though.

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