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

Re: git diff looping?

From
Junio C Hamano <gitster@pobox.com>
Date
Jun 16, 2009, 16:51 UTC
Message-ID
<7v3aa0dsvn.fsf@alter.siamese.dyndns.org>
In-Reply-To
<20090616114726.GA4343@coredump.intra.peff.net>
Jeff King <peff@peff.net> writes:
> I can reproduce the problem on Solaris 8 using git v1.6.3. It seems to
> be caused by a horribly slow system regex implementation; it really
> chokes on the regex we use to find the "funcname" line for java files.
Hmm.  Is running under LC_ALL=C LANG=C _with_ the slow system regex help?
Show 6 quoted lines
> I tried building against the code in compat/regex; it completes in a
> reasonable amount of time, though it is still noticeably slow. With
> system regex, the diff given above doesn't complete in less than 90
> seconds (at which I get bored and kill it). With compat/regex, it
> completes in about 2.2 seconds. Disabling the xfuncname, it completes in
> 0.14 seconds.

In this particular case it is clear that a good way to fix the problem is to replace Solaris's dumb regex implemention with what comes in compat/, but I at the same time have to wonder if that funcname pattern for java can somehow be simplified, so that it does not to require so sophisticated implementation of regexp?

Previous: John BitoNext: Jeff King
Message 16 of 37 in “git diff looping?”
  1. John BitoJun 16, 2009
  2. Jeff EplerJun 16, 2009
  3. John BitoJun 16, 2009
  4. Jeff KingJun 16, 2009
  5. Jeff KingJun 16, 2009
  6. 1/2 Makefile: refactor regex compat supportJeff King, Jun 16, 2009
  7. Johannes SixtJun 16, 2009
  8. Jeff KingJun 16, 2009
  9. 1/2 Makefile: refactor regex compat supportJeff King, Jun 16, 2009
  10. 2/2 Makefile: use compat regex on SolarisJeff King, Jun 16, 2009
  11. Brandon CaseyJun 16, 2009
  12. Mike RalphsonJun 17, 2009
  13. Mike RalphsonJun 17, 2009
  14. 2/2 Makefile: use compat regex on SolarisJeff King, Jun 16, 2009
  15. John BitoJun 16, 2009
  16. Junio C HamanoJun 16, 2009
  17. Jeff KingJun 16, 2009
  18. Brandon CaseyJun 16, 2009
  19. John BitoJun 16, 2009
  20. Jeff KingJun 16, 2009
  21. Brandon CaseyJun 16, 2009
  22. Paolo BonziniJun 17, 2009
  23. Jeff KingJun 17, 2009
  24. Paolo BonziniJun 17, 2009
  25. Andreas EricssonJun 17, 2009
  26. Paolo BonziniJun 17, 2009
  27. Andreas EricssonJun 17, 2009
  28. Paolo BonziniJun 17, 2009
  29. avoid exponential regex match for java and objc function namesPaolo Bonzini, Jun 17, 2009
  30. demerphqJun 17, 2009
  31. Jeff KingJun 17, 2009
  32. demerphqJun 17, 2009
  33. Paolo BonziniJun 17, 2009
  34. Junio C HamanoJun 17, 2009
  35. Paolo BonziniJun 18, 2009
  36. John BitoJun 16, 2009
  37. Jeff KingJun 16, 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.