From 2fee1e673b65dc4570f817f7e1168931f194a46b Mon Sep 17 00:00:00 2001
From: KongQun Yang <kqyang@google.com>
Date: Fri, 27 Jul 2018 17:55:54 -0700
Subject: [PATCH] Set default --io_block_size to 64K

--io_block_size determines the buffer size for each read/write in
ThreadedIO.

A big io_block_size does not help much as long as --io_cache_size
is big enough.

Instead, it may cause problems. For example, Linux pipes block until
reading io_block_size number of bytes, which causes a large delay
when reading audio streams.

Change-Id: I5bdd3d61388579c7e8647cdab3152135a40a752b
---
 packager/file/file.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packager/file/file.cc b/packager/file/file.cc
index 6c4933f6db..c0b4586e2d 100644
--- a/packager/file/file.cc
+++ b/packager/file/file.cc
@@ -27,7 +27,7 @@ DEFINE_uint64(io_cache_size,
               "Size of the threaded I/O cache, in bytes. Specify 0 to disable "
               "threaded I/O.");
 DEFINE_uint64(io_block_size,
-              2ULL << 20,
+              1ULL << 16,
               "Size of the block size used for threaded I/O, in bytes.");
 
 // Needed for Windows weirdness which somewhere defines CopyFile as CopyFileW.