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 <kerolasa@xxxxxx>
---
text-utils/more.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/text-utils/more.c b/text-utils/more.c
index ac35acc..598e048 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')
--
1.8.3.4
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