sfeed

commit 4599b3b679d538c75fb7de8190fe5fc340beacc2
parent 4e0df8dcb868d12745470794a97f7ab0eda8da8c
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Sat,  5 Feb 2022 13:36:53 +0100

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).

Diffstat:
M
sfeed.c
 | 
6
+++---

1 file changed, 3 insertions(+), 3 deletions(-)
diff --git 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))