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From: "Laszlo Ersek" <lersek@redhat.com>
To: Rebecca Cran <rebecca@bsdio.com>,
	devel@edk2.groups.io, bob.c.feng@intel.com, liming.gao@intel.com,
	leif.lindholm@linaro.org, michael.d.kinney@intel.com,
	afish@apple.com
Subject: Re: [PATCH 1/6] edksetup.sh: Use bash variable $PWD instead of executing pwd command
Date: Tue, 16 Jul 2019 12:36:27 +0200	[thread overview]
Message-ID: <e3b6f89a-d7c1-25ab-44f3-8cd14ddaa430@redhat.com> (raw)
In-Reply-To: <9f50c144-21d8-6b0d-8c4c-6a9382e89c50@redhat.com>

On 07/16/19 12:32, Laszlo Ersek wrote:
> On 07/16/19 04:13, Rebecca Cran wrote:
>> On 2019-07-15 19:37, Laszlo Ersek wrote:
>>>
>>> (Sorry if the reason was already given and I missed it:)
>>>
>>> Why is this an improvement?
>>>
>>> The docs at <https://man.openbsd.org/pwd.1> say:
>>>
>>> "pwd also exists as a built-in to ksh(1), which may have a different
>>> default behavior". Is that the reason?
>>
>> No, it's mainly as a (very minor) optimization: `pwd` runs the command
>> (even as a built-in), whereas $PWD simply evaluates the value of the
>> variable.
>>
>> Also, modern scripts as I understand it should generally use $(...) to
>> run commands, instead of `...`.
>>
>>
> 
> Makes sense, thanks.
> 
> For this patch:
> 
> Reviewed-by: Laszlo Ersek <lersek@redhat.com>

... As I requested a minute ago, my preference would be to see a v3 of
the full series on the list -- if you agree, please include the
"micro-optimization" language from your reply above in the commit
message of this patch, together with my R-b.

Thank you!
Laszlo

  reply	other threads:[~2019-07-16 10:36 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-15 22:25 [PATCH 1/6] edksetup.sh: Use bash variable $PWD instead of executing pwd command rebecca
2019-07-15 22:25 ` [PATCH 2/6] edksetup.sh: Use $SCRIPTNAME consistently instead of 'edksetup.sh' rebecca
2019-07-16  1:39   ` Laszlo Ersek
2019-07-15 22:25 ` [PATCH 3/6] edksetup.sh: when executing arithmetic commands, $ isn't needed rebecca
2019-07-16  1:40   ` Laszlo Ersek
2019-07-15 22:25 ` [PATCH 4/6] edksetup.sh: remove redundant -?, -h and --help in options parsing rebecca
2019-07-16  1:40   ` Laszlo Ersek
2019-07-15 22:25 ` [PATCH 5/6] edksetup.sh: Simplify SetupPython3 and SetupPython functions rebecca
2019-07-16  2:16   ` Laszlo Ersek
2019-07-16  2:27     ` rebecca
2019-07-16 10:38       ` Laszlo Ersek
2019-07-15 22:25 ` [PATCH 6/6] edksetup.sh: Add quotes and explicit checks in test statements rebecca
2019-07-16  1:47   ` Laszlo Ersek
2019-07-16  1:53     ` Laszlo Ersek
2019-07-16  2:20       ` [edk2-devel] " rebecca
2019-07-16 10:34         ` Laszlo Ersek
2019-07-16  1:37 ` [PATCH 1/6] edksetup.sh: Use bash variable $PWD instead of executing pwd command Laszlo Ersek
2019-07-16  2:13   ` rebecca
2019-07-16 10:32     ` Laszlo Ersek
2019-07-16 10:36       ` Laszlo Ersek [this message]
2019-07-16  9:16 ` Leif Lindholm
2019-07-16 11:40   ` Leif Lindholm

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