Files
node/lib/internal
James M Snell 97af3d7da5 perf_hooks: add performanceNodeTiming.uvMetricsInfoBigInt
`performance.nodeTiming.uvMetricsInfo` returns the libuv event loop
metrics as numbers, which are only exact up to
`Number.MAX_SAFE_INTEGER`. Add `uvMetricsInfoBigInt`, which returns
the same metrics as bigints backed by `uint64_t` storage, carrying the
full 64-bit range reported by libuv.

A single native call fills both a `Float64Array` and a
`BigUint64Array`, so `uvMetricsInfo` does not pay for bigint
allocation and conversion. The new property is omitted from
`toJSON()`, as `JSON.stringify()` cannot serialize bigints.

Assisted-by: OpenCode
Signed-off-by: James M Snell <jasnell@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/66094
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
2026-09-19 22:02:10 +00:00
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Internal Modules

The modules located in lib/internal directory are exclusively meant for internal usage within the Node.js core. They are not intended to be accessed via user modules require(). These modules may change at any point in time. Relying on these internal modules outside the core is not supported and can lead to unpredictable behavior.

In certain scenarios, accessing these internal modules for debugging or experimental purposes might be necessary. Node.js provides the --expose-internals flag to expose these modules to userland code. This flag only exists to assist Node.js maintainers with debugging internals. It is not meant for use outside the project.