[core] perf adjustments to avoid load miss

src/response.c

@@ -310,6 +310,9 @@ static handler_t http_response_physical_path_check(request_st * const r) {
 		return HANDLER_FINISHED;
 	}
 
+	if (S_ISREG(sce->st.st_mode)) /*(common case)*/
+		return HANDLER_GO_ON;
+
 	if (S_ISDIR(sce->st.st_mode)) {
 		if (r->uri.path.ptr[buffer_string_length(&r->uri.path) - 1] != '/') {
 			/* redirect to .../ */
@@ -318,8 +321,8 @@ static handler_t http_response_physical_path_check(request_st * const r) {
 
 			return HANDLER_FINISHED;
 		}
-	} else if (!S_ISREG(sce->st.st_mode)) {
-		/* any special handling of non-reg files ?*/
+	} else {
+		/* any special handling of other non-reg files ?*/
 	}
 
 	return HANDLER_GO_ON;

src/stat_cache.h

@@ -50,7 +50,10 @@ void stat_cache_delete_entry(const char *name, uint32_t len);
 void stat_cache_delete_dir(const char *name, uint32_t len);
 void stat_cache_invalidate_entry(const char *name, uint32_t len);
 stat_cache_entry * stat_cache_get_entry(const buffer *name);
+
+__attribute_cold__
 int stat_cache_path_contains_symlink(const buffer *name, log_error_st *errh);
+
 int stat_cache_open_rdonly_fstat (const buffer *name, struct stat *st, int symlinks);
 
 void stat_cache_trigger_cleanup(void);