sfeed: small optimization

For feeds with lots of content data:

Small performance improvement (~2%) on systems that implement putchar as a
macro.  On some systems using a function call for putchar it can be easier to
replace with putchar_unlocked.

(On an older MIPS32 VM changing putchar to putchar_unlocked makes writing 5x
faster).

1 files changed, 3 insertions, 3 deletions

diff --git a/sfeed.c b/sfeed.c
index 126c685..d9d91fd 100644
--- a/sfeed.c
+++ b/sfeed.c
@@ -321,9 +321,9 @@ string_print_encoded(String *s)
 
 	for (; *p && p != e; p++) {
 		switch (*p) {
-		case '\n': fputs("\\n",  stdout); break;
-		case '\\': fputs("\\\\", stdout); break;
-		case '\t': fputs("\\t",  stdout); break;
+		case '\n': putchar('\\'); putchar('n'); break;
+		case '\\': putchar('\\'); putchar('\\'); break;
+		case '\t': putchar('\\'); putchar('t'); break;
 		default:
 			/* ignore control chars */
 			if (!iscntrl((unsigned char)*p))