diff options
Diffstat (limited to 'src/include/c.h')
| -rw-r--r-- | src/include/c.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/include/c.h b/src/include/c.h index 8f537860d2e..a51e012dcf0 100644 --- a/src/include/c.h +++ b/src/include/c.h @@ -12,7 +12,7 @@ * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: c.h,v 1.127 2002/10/08 19:17:58 momjian Exp $ + * $Id: c.h,v 1.128 2002/10/08 23:12:22 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -572,10 +572,11 @@ typedef NameData *Name; * Exactly the same as standard library function memset(), but considerably * faster for zeroing small word-aligned structures (such as parsetree nodes). * This has to be a macro because the main point is to avoid function-call - * overhead. + * overhead. However, we have also found that the loop is faster than + * native libc memset() on some platforms, even those with assembler + * memset() functions. More research needs to be done, perhaps with + * platform-specific MEMSET_LOOP_LIMIT values or tests in configure. * - * We got the MEMSET_LOOP_LIMIT value by testing this against the libc - * memset() on several platforms, some with assembly language versions. * bjm 2002-10-08 */ #define MemSet(start, val, len) \ |