Skip to content
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

Jump to bottom

doc: add comment about highWaterMark limit #33432

Closed
wants to merge 1 commit into from
Closed

doc: add comment about highWaterMark limit #33432

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
5 changes: 5 additions & 0 deletions doc/api/stream.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,11 @@ A key goal of the `stream` API, particularly the [`stream.pipe()`][] method,
is to limit the buffering of data to acceptable levels such that sources and
destinations of differing speeds will not overwhelm the available memory.

The `highWaterMark` option is a threshold, not a limit: it dictates the amount
of data that a stream buffers before it stops asking for more data. It does not
enforce a strict memory limitation in general. Specific stream implementations
may choose to enforce stricter limits but doing so is optional.

Because [`Duplex`][] and [`Transform`][] streams are both `Readable` and
`Writable`, each maintains *two* separate internal buffers used for reading and
writing, allowing each side to operate independently of the other while
Expand Down