Skip to content

perf: buffer native stdout writes #869

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
He-Pin wants to merge 1 commit into
base: master
Choose a base branch
from
+6 −0
Open

perf: buffer native stdout writes #869

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 6 additions & 0 deletions sjsonnet/src-native/sjsonnet/NativeOutputStream.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,8 @@ import scala.scalanative.unsigned._
* Uses stdio.fwrite which has internal C library buffering, avoiding per-call syscall overhead.
*/
class NativeOutputStream(file: Ptr[FILE]) extends OutputStream {
stdio.setvbuf(file, null, stdio._IOFBF, NativeOutputStream.BufferSize.toUSize)

override def write(b: Int): Unit =
stdio.fputc(b, file)

Expand All @@ -27,3 +29,7 @@ class NativeOutputStream(file: Ptr[FILE]) extends OutputStream {
override def close(): Unit =
flush()
}

object NativeOutputStream {
private final val BufferSize = 256 * 1024
}
Loading