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authorRich Felker <dalias@aerifal.cx>2011-04-04 16:24:49 -0400
committerRich Felker <dalias@aerifal.cx>2011-04-04 16:24:49 -0400
commitbd57e2b43a5b56c00a82adbde0e33e5820c81164 (patch)
tree38cbea7e455183a890bc2293ca1f959816158fa2 /src/stdio/stderr.c
parent5600088d387491bd0af1879aa64e5d388805d8ec (diff)
downloadmusl-bd57e2b43a5b56c00a82adbde0e33e5820c81164.tar.gz
use a local temp buffer for unbuffered streams in vfprintf
this change makes it so most calls to fprintf(stderr, ...) will result in a single writev syscall, as opposed to roughly 2*N syscalls (and possibly more) where N is the number of format specifiers. in principle we could use a much larger buffer, but it's best not to increase the stack requirements too much. most messages are under 80 chars.
Diffstat (limited to 'src/stdio/stderr.c')
-rw-r--r--src/stdio/stderr.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/stdio/stderr.c b/src/stdio/stderr.c
index 3bdaffbc..9a70700c 100644
--- a/src/stdio/stderr.c
+++ b/src/stdio/stderr.c
@@ -6,6 +6,7 @@ static FILE f = {
.buf_size = 0,
.fd = 2,
.flags = F_PERM | F_NORD,
+ .lbf = -1,
.write = __stdio_write,
.seek = __stdio_seek,
.close = __stdio_close,