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doc: document vm timeout option perf impact

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Mention that the `timeout` option has a noticeable performance impact.

Fixes: https://github.com/nodejs/node/issues/10453
PR-URL: https://github.com/nodejs/node/pull/12751
Reviewed-By: Alexey Orlenko <eaglexrlnk@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
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Anna Henningsen 2017-04-29 23:48:03 +02:00
parent 896be833c8
commit 2bf461e6f5
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doc/api/vm.md
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@ -125,6 +125,10 @@ console.log(util.inspect(sandbox));
// { animal: 'cat', count: 12, name: 'kitty' }
```
*Note*: Using the `timeout` or `breakOnSigint` options will result in new
event loops and corresponding threads being started, which have a non-zero
performance overhead.
### script.runInNewContext([sandbox][, options])
<!-- YAML
added: v0.3.1