I was wrong in my testing.

There isn't a speedup when using unbuffered I/O. It slows it down in fact.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@181060 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 0 insertions, 5 deletions

diff --git a/SDKs/darwin/usr/include/stdio.h b/SDKs/darwin/usr/include/stdio.h
index 5bbd8a55b..63b10a86b 100644
--- a/SDKs/darwin/usr/include/stdio.h
+++ b/SDKs/darwin/usr/include/stdio.h
@@ -74,7 +74,6 @@ size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict)
 size_t fread(void * __restrict, size_t, size_t, FILE * __restrict);
 long ftell(FILE *);
 int fseek(FILE *, long, int);
-void setbuf(FILE * __restrict, char * __restrict);
 
 int snprintf(char * __restrict, size_t, const char * __restrict, ...);
 
diff --git a/SDKs/linux/usr/include/stdio.h b/SDKs/linux/usr/include/stdio.h
index 0ca10fabe..7c258d2ac 100644
--- a/SDKs/linux/usr/include/stdio.h
+++ b/SDKs/linux/usr/include/stdio.h
@@ -38,6 +38,5 @@ extern size_t fwrite(const void * restrict, size_t, size_t, FILE * restrict);
 extern size_t fread(void * restrict, size_t, size_t, FILE * restrict);
 extern long ftell(FILE *);
 extern int fseek(FILE *, long, int);
-extern void setbuf(FILE * restrict, char * restrict);
 
 #endif /* __STDIO_H__ */
diff --git a/lib/profile/GCDAProfiling.c b/lib/profile/GCDAProfiling.c
index 3e0fff25f..653f641f7 100644
--- a/lib/profile/GCDAProfiling.c
+++ b/lib/profile/GCDAProfiling.c
@@ -194,9 +194,6 @@ void llvm_gcda_start_file(const char *orig_filename, const char version[4]) {
     }
   }
 
-  /* Make the file I/O unbuffered. */
-  setbuf(output_file, (char*)NULL);
-
   /* gcda file, version, stamp LLVM. */
   fwrite("adcg", 4, 1, output_file);
   fwrite(version, 4, 1, output_file);