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std: Turn down the stdout chunk size #16952

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merged 1 commit into from
Sep 8, 2014
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std: Turn down the stdout chunk size #16952

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9 changes: 8 additions & 1 deletion src/libstd/io/stdio.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -362,7 +362,14 @@ impl Writer for StdWriter {
// sizes. For an example, see #14940. For this reason, chunk the output
// buffer on windows, but on unix we can just write the whole buffer all
// at once.
let max_size = if cfg!(windows) {64 * 1024} else {uint::MAX};
//
// For some other references, it appears that this problem has been
// encountered by others [1] [2]. We choose the number 8KB just because
// libuv does the same.
//
// [1]: https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1232
// [2]: http://www.mail-archive.com/log4net-dev@logging.apache.org/msg00661.html
let max_size = if cfg!(windows) {8192} else {uint::MAX};
for chunk in buf.chunks(max_size) {
try!(match self.inner {
TTY(ref mut tty) => tty.write(chunk),
Expand Down