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Re: [PATCH 1/9] test-mergesort: use strbuf_getline()

From
René Scharfe <l.s.r@web.de>
Date
Oct 2, 2021, 16:56 UTC
Message-ID
<0bff46b8-fd45-c4e5-e8b3-60e68ba7c2b9@web.de>
In-Reply-To
<87fstjpzdu.fsf@evledraar.gmail.com>
Am 02.10.21 um 11:08 schrieb Ævar Arnfjörð Bjarmason:
Show 10 quoted lines
>
> On Fri, Oct 01 2021, René Scharfe wrote:
>
>>  	while (lines) {
>> -		printf("%s", lines->text);
>> +		puts(lines->text);
>>  		lines = lines->next;
>
> Aside: I wonder if we should have a coccicheck for that (not as part of
> this series), but maybe it would generate too much noise.

To replace printf("%s\n", s) with puts(s)? I considered such a semantic patch before as well. It would effectively forbid that specific printf usage. And why shouldn't it? puts(3) is easier to use and its call is shorter.

But puts(3) is also confusing: It adds a trailing newline, but its sibling fputs(3) doesn't. And it would look weird in the middle of a run of printf calls.

Clang already does the replacement with -O1 and GCC even with -O0, so there is no further performance improvement or object text size reduction to be gained.

And so I dropped the idea.
René
Previous: Ævar Arnfjörð BjarmasonNext: René Scharfe
Message 4 of 29 in “mergesort: improve tests and performance”
  1. 0/9 mergesort: improve tests and performanceRené Scharfe, Oct 1, 2021
  2. 1/9 test-mergesort: use strbuf_getline()René Scharfe, Oct 1, 2021
  3. Ævar Arnfjörð BjarmasonOct 2, 2021
  4. René ScharfeOct 2, 2021
  5. 2/9 test-mergesort: add sort subcommandRené Scharfe, Oct 1, 2021
  6. Junio C HamanoOct 1, 2021
  7. 3/9 test-mergesort: add test subcommandRené Scharfe, Oct 1, 2021
  8. Junio C HamanoOct 1, 2021
  9. Ævar Arnfjörð BjarmasonOct 2, 2021
  10. René ScharfeOct 3, 2021
  11. René ScharfeOct 3, 2021
  12. Junio C HamanoOct 3, 2021
  13. René ScharfeOct 7, 2021
  14. 10/9 test-mergesort: use repeatable random numbersRené Scharfe, Oct 8, 2021
  15. Jeff KingOct 8, 2021
  16. Ævar Arnfjörð BjarmasonOct 8, 2021
  17. René ScharfeOct 8, 2021
  18. Ævar Arnfjörð BjarmasonOct 8, 2021
  19. 4/9 test-mergesort: add generate subcommandRené Scharfe, Oct 1, 2021
  20. 5/9 test-mergesort: add unriffle modeRené Scharfe, Oct 1, 2021
  21. 6/9 test-mergesort: add unriffle_skewed modeRené Scharfe, Oct 1, 2021
  22. 7/9 p0071: measure sorting of already sorted and reversed filesRené Scharfe, Oct 1, 2021
  23. 8/9 p0071: test performance of llist_mergesort()René Scharfe, Oct 1, 2021
  24. 9/9 mergesort: use ranks stackRené Scharfe, Oct 1, 2021
  25. Ævar Arnfjörð BjarmasonJan 17, 2022
  26. René ScharfeJan 17, 2022
  27. René ScharfeJan 18, 2022
  28. Ævar Arnfjörð BjarmasonJan 18, 2022
  29. René ScharfeJan 18, 2022

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