frew@ucsbcsl.UUCP (James Frew) (03/28/85)
Index: /usr/src/ucb/ul.c 4.2BSD
Description:
Ul's system time can be cut by about 80% by letting stdio
decide what size buffer to use and when to flush it.
Ul's user time can be cut by about 2/3 by calling bzero()
instead of explicitly zeroing an array before each input line
is processed.
Repeat-By:
Time "ul" on a large file before and after applying the
following tweaks.
Fix:
The following diffs are easy to find, so to save space they are
given without the "-c" context.
32,33d31
< char buf[BUFSIZ];
<
92d89
< setbuf(stdout, buf);
246d242
< fflush(stdout);
320,323c316,317
< for (i=0; i<MAXBUF; i++) {
< obuf[i].c_char = '\0';
< obuf[i].c_mode = NORMAL;
< }
---
> /* following depends on NORMAL == 000 */
> bzero(obuf, sizeof(obuf));
-----------------------------------------------------------------------
--
James Frew {arizona,cepu,sdcarl,ucbvax}!ucsbcsl!frew
Computer Systems Lab., Univ. of Calif., Santa Barbara, CA 93106
(805) 961-2309