From 2587c5937c506eb399e2012141c6d6b7d381552b Mon Sep 17 00:00:00 2001 From: Sami Kerola Date: Sun, 4 Aug 2013 00:15:20 +0100 Subject: more: make output redirection more efficient Especially with large inputs the change improves performance considerably. old> time more /boot/vmlinuz >/dev/null real 0m0.224s new> more /boot/vmlinuz >/dev/null real 0m0.009s Signed-off-by: Sami Kerola --- text-utils/more.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'text-utils/more.c') diff --git a/text-utils/more.c b/text-utils/more.c index ac35acc0b..598e04896 100644 --- a/text-utils/more.c +++ b/text-utils/more.c @@ -780,10 +780,11 @@ void __attribute__((__noreturn__)) end_it(int dummy __attribute__((__unused__))) void copy_file(register FILE *f) { - register int c; + char buf[BUFSIZ]; + size_t sz; - while ((c = getc(f)) != EOF) - putchar(c); + while ((sz = fread(&buf, sizeof(char), sizeof(buf), f)) > 0) + fwrite(&buf, sizeof(char), sz, stdout); } #define ringbell() putcerr('\007') -- cgit v1.2.3-55-g7522