# node:perf_hooks

> Node's performance timeline, observers, and histograms.

`node:perf_hooks` matches Node; its `performance` and constructors are the same objects as the
[Performance globals](https://elide.help/docs/api-wintercg-performance).

## Differences from Node

- `constants` is an empty object.
- `PerformanceResourceTiming` is absent.
- `nodeTiming.v8Start`, `environment`, `loopExit`, and `idleTime` are zero.