merge revision(s) 33667:

* io.c (io_fwrite): call rb_w32_write_console() only if FMODE_TTY is
  set.  this is the one of the reason of IO writing slowness of Windows
  in 1.9.3 or later.

[Backport #5592]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@34436 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 2 deletions

diff --git a/io.c b/io.c
index 69c3c9e6eb..794f6de60b 100644
--- a/io.c
+++ b/io.c
@@ -936,8 +936,10 @@ static long
 io_fwrite(VALUE str, rb_io_t *fptr, int nosync)
 {
 #ifdef _WIN32
-    long len = rb_w32_write_console(str, fptr->fd);
-    if (len > 0) return len;
+    if (fptr->mode & FMODE_TTY) {
+	long len = rb_w32_write_console(str, fptr->fd);
+	if (len > 0) return len;
+    }
 #endif
     str = do_writeconv(str, fptr);
     return io_binwrite(str, RSTRING_PTR(str), RSTRING_LEN(str),