From: Jeff King <peff@peff.net>
To: Eric Sunshine <sunshine@sunshineco.com>
Cc: "Git List" <git@vger.kernel.org>, "René Scharfe" <l.s.r@web.de>,
"Rasmus Villemoes" <rv@rasmusvillemoes.dk>
Subject: Re: [PATCH 7/9] strbuf_getwholeline: use getdelim if it is available
Date: Fri, 8 May 2015 21:09:52 -0400 [thread overview]
Message-ID: <20150509010952.GA29555@peff.net> (raw)
In-Reply-To: <CAPig+cQi7SfJJc4d3DJ2mJ0-5vT7LJDttPPec=UEsmjiqtLcZQ@mail.gmail.com>
On Fri, May 08, 2015 at 07:56:28PM -0400, Eric Sunshine wrote:
> I spent some time downloading old Xcode releases and poking through
> the packages. Xcode 3.2.x seems to be the last in the Xcode 3 series,
> and none of the Xcode 3.2.x versions I examined carried getdelim().
> The first package in which I found getdelim() was Xcode 4.1.
> (Unfortunately, Apple doesn't seem to make Xcode 4.0 available for
> download anymore or it's only available to paying developers, so I
> couldn't check it.) According to Wikipedia[1], Xcode 4.1 was released
> the same day as Lion (OS X 10.7 [2]), but was also available to paying
> developers for Snow Leopard (OS X 10.6).
>
> Consequently, I think it's safe to say that getdelim() is available
> for Lion (10.7) and later. If we don't mind being a bit less
> conservative, then we might assume that it also is available for Snow
> Leopard (10.6), which it definitely supported, but perhaps that's too
> risky, since not everyone would have been a paid subscriber.
Thanks for digging. I'd argue for the conservative choice, simply
because this is a pure optimization. The old code should work just fine,
and people have been living with it for years.
I doubt it will affect many people either way, though. Lion is 4 years
old, and most OS X people seem to upgrade fairly regularly. It is not
like long-term server systems where we are supporting Solaris 7. :)
Want to roll a patch?
> Alternately, we could make the test more dynamic and accurate by
> grepping stdio.h for 'getdelim' or just by trying a test compile,
> though that's probably too expensive.
The natural place would be in configure.ac, and that is orthogonal to
the default Darwin setting, I think.
-Peff
next prev parent reply other threads:[~2015-05-09 1:10 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-05 1:06 [PATCH 0/6] address packed-refs speed regressions Jeff King
2015-04-05 1:07 ` [PATCH 1/6] strbuf_getwholeline: use getc macro Jeff King
2015-04-05 1:08 ` [PATCH 2/6] git-compat-util: add fallbacks for unlocked stdio Jeff King
2015-04-05 1:11 ` [PATCH 3/6] strbuf_getwholeline: use getc_unlocked Jeff King
2015-04-05 4:56 ` Jeff King
2015-04-05 5:27 ` Jeff King
2015-04-05 5:35 ` Jeff King
2015-04-05 20:49 ` Junio C Hamano
2015-04-05 14:36 ` Duy Nguyen
2015-04-05 18:24 ` Jeff King
2015-04-05 20:09 ` Junio C Hamano
2015-04-07 13:48 ` Rasmus Villemoes
2015-04-07 19:04 ` Jeff King
2015-04-07 22:43 ` Rasmus Villemoes
2015-04-08 0:17 ` Jeff King
2015-04-05 1:11 ` [PATCH 4/6] strbuf: add an optimized 1-character strbuf_grow Jeff King
2015-04-06 2:13 ` Eric Sunshine
2015-04-06 5:05 ` Jeff King
2015-04-05 1:11 ` [PATCH 5/6] t1430: add another refs-escape test Jeff King
2015-04-05 1:15 ` [PATCH 6/6] refname_is_safe: avoid expensive normalize_path_copy call Jeff King
2015-04-05 13:41 ` [PATCH 0/6] address packed-refs speed regressions René Scharfe
2015-04-05 18:52 ` Jeff King
2015-04-05 18:59 ` Jeff King
2015-04-05 23:04 ` René Scharfe
2015-04-05 22:39 ` René Scharfe
2015-04-06 4:49 ` Jeff King
2015-04-16 8:47 ` [PATCH v2 0/9] " Jeff King
2015-04-16 8:48 ` [PATCH 1/9] strbuf_getwholeline: use getc macro Jeff King
2015-04-16 8:48 ` [PATCH 2/9] git-compat-util: add fallbacks for unlocked stdio Jeff King
2015-04-16 8:49 ` [PATCH 3/9] strbuf_getwholeline: use getc_unlocked Jeff King
2015-04-16 8:51 ` [PATCH 4/9] config: use getc_unlocked when reading from file Jeff King
2015-04-16 8:53 ` [PATCH 5/9] strbuf_addch: avoid calling strbuf_grow Jeff King
2015-04-16 8:58 ` [PATCH 6/9] strbuf_getwholeline: " Jeff King
2015-04-16 9:01 ` [PATCH 7/9] strbuf_getwholeline: use getdelim if it is available Jeff King
2015-04-17 10:16 ` Eric Sunshine
2015-04-21 23:09 ` Jeff King
2015-05-08 23:56 ` Eric Sunshine
2015-05-09 1:09 ` Jeff King [this message]
2015-06-02 18:22 ` Eric Sunshine
2015-04-22 18:00 ` Johannes Schindelin
2015-04-22 18:06 ` Jeff King
2015-04-16 9:03 ` [PATCH 8/9] read_packed_refs: avoid double-checking sane refs Jeff King
2015-04-16 9:04 ` [PATCH 9/9] t1430: add another refs-escape test Jeff King
2015-04-16 9:25 ` [PATCH v2 0/9] address packed-refs speed regressions Jeff King
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