trivial optimization to printf: avoid wasted call frame

amusingly, this cuts more than 10% off the run time of printf("a"); on
the machine i tested it on.

sadly the same optimization is not possible for snprintf without
duplicating all the pseudo-FILE setup code, which is not worth it.

diff --git a/src/stdio/printf.c b/src/stdio/printf.c
index efeb8b3..7b7c329 100644 (file)
--- a/src/stdio/printf.c
+++ b/src/stdio/printf.c
@@ -6,7 +6,7 @@ int printf(const char *fmt, ...)
        int ret;
        va_list ap;
        va_start(ap, fmt);
-       ret = vprintf(fmt, ap);
+       ret = vfprintf(stdout, fmt, ap);
        va_end(ap);
        return ret;
 }