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doc: document that `process.send` is synchronous 

Ref #2598
pull/41362/head
Maciej Małecki 2013-11-12 11:28:44 +01:00 committed by Timothy J Fontaine
parent ffb718b5a3
commit 5a8de857f0
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@ -194,6 +194,11 @@ And then the child script, `'sub.js'` might look like this:
In the child the `process` object will have a `send()` method, and `process` In the child the `process` object will have a `send()` method, and `process`
will emit objects each time it receives a message on its channel. will emit objects each time it receives a message on its channel.
Please note that the `send()` method on both the parent and child are
synchronous - sending large chunks of data is not advised (pipes can be used
instead, see
[`child_process.spawn`](#child_process_child_process_spawn_command_args_options)).
There is a special case when sending a `{cmd: 'NODE_foo'}` message. All messages There is a special case when sending a `{cmd: 'NODE_foo'}` message. All messages
containing a `NODE_` prefix in its `cmd` property will not be emitted in containing a `NODE_` prefix in its `cmd` property will not be emitted in
the `message` event, since they are internal messages used by node core. the `message` event, since they are internal messages used by node core.