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Use likely()/unlikely() macros to improve branch prediction.

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This commit is contained in:
Simon Ruderich
2013-06-10 06:06:00 +02:00
parent 9862b8c8f1
commit 048bd6f9e7
5 changed files with 56 additions and 14 deletions
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9
src/coloredstderr.c
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@@ -51,6 +51,7 @@ static int force_write_to_non_tty;
#include "constants.h"
#include "compiler.h"
#ifdef DEBUG
# include "debug.h"
#endif
@@ -68,7 +69,7 @@ static void dup_fd(int oldfd, int newfd) {
debug("%3d -> %3d\t\t\t[%d]\n", oldfd, newfd, getpid());
#endif
if (!initialized) {
if (unlikely(!initialized)) {
init_from_environment();
}
@@ -90,7 +91,7 @@ static void close_fd(int fd) {
debug("%3d -> .\t\t\t[%d]\n", fd, getpid());
#endif
if (!initialized) {
if (unlikely(!initialized)) {
init_from_environment();
}
@@ -124,7 +125,7 @@ inline static void init_pre_post_string(void) {
static void handle_fd_pre(int fd) {
int saved_errno = errno;
if (!pre_string || !post_string) {
if (unlikely(!pre_string || !post_string)) {
init_pre_post_string();
}
@@ -145,7 +146,7 @@ static void handle_fd_post(int fd) {
static void handle_file_pre(FILE *stream) {
int saved_errno = errno;
if (!pre_string || !post_string) {
if (unlikely(!pre_string || !post_string)) {
init_pre_post_string();
}