Re: Emacs HEAD regressions (another test case)

[YAMAMOTO Mitsuharu]

>>>>> On Thu, 05 Feb 2009 11:08:44 +0100, Angelo Graziosi <address@hidden> said:

>> Anything that can generate 6kB lines in your complation buffer should
>> do.  Try calling a shell script that writes the long line.  For me, it
>> was a long compilation line from "make".

> Indeed! The attached script 'prints' 6x1024 'x' characters, and on
> GNU/LINUX KUBUNTU 8.04.02 it takes:

> 4 seconds with Emacs CVS LESS THAN OR EQUAL TO (<=) 20090129 15:30

> 2:15 minutes, i.e. 60x2+15=135 seconds with Emacs GREATER THAN OR EQUAL
> TO (>=) 20090129 15:40!

Could you try the patch below to see if it affects the performance?

                                     YAMAMOTO Mitsuharu
                                address@hidden

Index: src/atimer.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/atimer.c,v
retrieving revision 1.31
diff -c -p -r1.31 atimer.c
*** src/atimer.c        30 Jan 2009 13:06:09 -0000      1.31
--- src/atimer.c        6 Feb 2009 10:59:24 -0000
*************** run_timers ()
*** 384,389 ****
--- 384,391 ----
        EMACS_GET_TIME (now);
      }
  
+   if (atimers == NULL)
+     pending_atimers = 0;
  #ifdef SYNC_INPUT
    if (pending_atimers)
      pending_signals = 1;