git/list[1] front-page[2] threads[3] people[4] search[5] about
 

Re: x86 SHA1: Faster than OpenSSL

From
Jonathan del Strother <maillist@steelskies.com>
Date
Aug 3, 2009, 07:36 UTC
Message-ID
<57518fd10908030036l22ccdcf1va2e8ee450c4f5ee5@mail.gmail.com>
In-Reply-To
<20090803034741.23415.qmail@science.horizon.com>
On Mon, Aug 3, 2009 at 4:47 AM, George Spelvin<linux@horizon.com> wrote:
Show 8 quoted lines
> (Work in progress, state dump to mailing list archives.)
>
> This started when discussing git startup overhead due to the dynamic
> linker.  One big contributor is the openssl library, which is used only
> for its optimized x86 SHA-1 implementation.  So I took a look at it,
> with an eye to importing the code directly into the git source tree,
> and decided that I felt like trying to do better.
>

FWIW, this doesn't work on OS X / Darwin. 'as' doesn't take a --32 flag, it takes an -arch i386 flag. After changing that, I get:

as -arch i386 -o sha1-586.o sha1-586.s sha1-586.s:4:Unknown pseudo-op: .type sha1-586.s:4:Rest of line ignored. 1st junk character valued 115 (s). sha1-586.s:5:Alignment too large: 15. assumed. sha1-586.s:19:Alignment too large: 15. assumed. sha1-586.s:1438:Unknown pseudo-op: .size sha1-586.s:1438:Rest of line ignored. 1st junk character valued 115 (s). make: *** [sha1-586.o] Error 1

- at which point I have no idea how to fix it.
Previous: George SpelvinNext: Mark Lodato
Message 20 of 60 in “Re: Performance issue of 'git branch'”
  1. George SpelvinJul 26, 2009
  2. Request for benchmarking: x86 SHA1 codeGeorge Spelvin, Jul 31, 2009
  3. Erik Faye-LundJul 31, 2009
  4. George SpelvinJul 31, 2009
  5. Michael J GruberJul 31, 2009
  6. Erik Faye-LundJul 31, 2009
  7. Johannes SchindelinJul 31, 2009
  8. George SpelvinJul 31, 2009
  9. Erik Faye-LundJul 31, 2009
  10. George SpelvinJul 31, 2009
  11. Michael J GruberJul 31, 2009
  12. Michael J GruberJul 31, 2009
  13. Carlos R. MafraJul 31, 2009
  14. Brian RistucciaJul 31, 2009
  15. George SpelvinJul 31, 2009
  16. Jakub NarebskiJul 31, 2009
  17. Peter HarrisJul 31, 2009
  18. Peter HarrisJul 31, 2009
  19. x86 SHA1: Faster than OpenSSLGeorge Spelvin, Aug 3, 2009
  20. Jonathan del StrotherAug 3, 2009
  21. Mark LodatoAug 4, 2009
  22. Linus TorvaldsAug 4, 2009
  23. Linus TorvaldsAug 4, 2009
  24. Jon SmirlAug 4, 2009
  25. George SpelvinAug 4, 2009
  26. Jon SmirlAug 4, 2009
  27. Dmitry PotapovAug 4, 2009
  28. Andy PolyakovAug 18, 2009
  29. George SpelvinAug 4, 2009
  30. Linus TorvaldsAug 4, 2009
  31. George SpelvinAug 4, 2009
  32. Junio C HamanoAug 4, 2009
  33. George SpelvinAug 5, 2009
  34. Johannes SchindelinAug 5, 2009
  35. Junio C HamanoAug 5, 2009
  36. Linus TorvaldsAug 5, 2009
  37. Linus TorvaldsAug 5, 2009
  38. Linus TorvaldsAug 6, 2009
  39. Nicolas PitreAug 6, 2009
  40. Junio C HamanoAug 6, 2009
  41. Linus TorvaldsAug 6, 2009
  42. Nicolas PitreAug 6, 2009
  43. Linus TorvaldsAug 6, 2009
  44. Artur SkawinaAug 6, 2009
  45. Linus TorvaldsAug 6, 2009
  46. Linus TorvaldsAug 6, 2009
  47. Linus TorvaldsAug 6, 2009
  48. Artur SkawinaAug 6, 2009
  49. Linus TorvaldsAug 6, 2009
  50. Artur SkawinaAug 6, 2009
  51. George SpelvinAug 6, 2009
  52. George SpelvinAug 6, 2009
  53. Artur SkawinaAug 6, 2009
  54. Linus TorvaldsAug 6, 2009
  55. Artur SkawinaAug 6, 2009
  56. Artur SkawinaAug 6, 2009
  57. Artur SkawinaAug 6, 2009
  58. Erik Faye-LundAug 6, 2009
  59. Linus TorvaldsAug 4, 2009
  60. Andy PolyakovAug 18, 2009

Read the whole thread, see it on lore, or plain text.

$ cat FOOTERMessages come from the public archive at lore.kernel.org/git, fetched every hour. The front page is chosen and written each morning by an AI editor and can be wrong; the threads themselves are the record. About and API. For agents: an MCP server at https://gitlist.dev/mcp, and any thread, story or person page as Markdown by adding .md to its URL (or sending Accept: text/markdown). Details in /llms.txt.