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bug#34852: 26.1; seq-intersection ignores nil as element
From: |
Basil L. Contovounesios |
Subject: |
bug#34852: 26.1; seq-intersection ignores nil as element |
Date: |
Thu, 14 Mar 2019 17:02:22 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Michael Heerdegen <michael_heerdegen@web.de> writes:
> "Basil L. Contovounesios" <contovob@tcd.ie> writes:
>
>> My first patch makes an analogous backward-compatible change using the
>> more efficient seq-position in place of seq-some.
>
> Why is it more efficient? The implementations are more or less
> analogue, with the exception that seq-position additionally increments a
> counter.
Because seq-some involves an additional level of function indirection.
This is confirmed by profiling and the attached mini-benchmark, when run
as follows:
emacs -batch -f batch-byte-compile bench.el
emacs -script bench.elc
A call to seq-position is also less verbose than one to seq-some for the
purpose of finding an element of a sequence.
Having said that, the differences are obviously very small.
--
Basil
- bug#34852: 26.1; seq-intersection ignores nil as element, (continued)
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Michael Heerdegen, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Basil L. Contovounesios, 2019/03/15
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/15
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/16
- bug#34852: 26.1; seq-intersection ignores nil as element, Basil L. Contovounesios, 2019/03/16
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/16
- bug#34852: 26.1; seq-intersection ignores nil as element, Basil L. Contovounesios, 2019/03/15
- bug#34852: 26.1; seq-intersection ignores nil as element, Basil L. Contovounesios, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Michael Heerdegen, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element,
Basil L. Contovounesios <=
- bug#34852: 26.1; seq-intersection ignores nil as element, Basil L. Contovounesios, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Nicolas Petton, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Basil L. Contovounesios, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Nicolas Petton, 2019/03/18
- bug#34852: 26.1; seq-intersection ignores nil as element, Michael Heerdegen, 2019/03/18
- bug#34852: 26.1; seq-intersection ignores nil as element, Nicolas Petton, 2019/03/18
- bug#34852: 26.1; seq-intersection ignores nil as element, Nicolas Petton, 2019/03/20
- bug#34852: 26.1; seq-intersection ignores nil as element, Michael Heerdegen, 2019/03/20
- bug#34852: 26.1; seq-intersection ignores nil as element, Nicolas Petton, 2019/03/21
- bug#34852: 26.1; seq-intersection ignores nil as element, Basil L. Contovounesios, 2019/03/21