The `bigint` version of the `hrtime()` method returning the current high-resolution real time in nanoseconds as a `bigint`. Unlike `hrtime()`, it does not support an additional time argument since the difference can just be computed directly by subtraction of the two `bigint`s. ```js import { hrtime } from 'node:process'; const start = hrtime.bigint(); // 191051479007711n setTimeout(() => { const end = hrtime.bigint(); // 191052633396993n console.log(`Benchmark took ${end - start} nanoseconds`); // Benchmark took 1154389282 nanoseconds }, 1000); ```