// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license. import * as dispatch from "./dispatch"; import { sendSync } from "./dispatch_json"; interface NowResponse { seconds: number; subsecNanos: number; } export class Performance { /** Returns a current time from Deno's start in milliseconds. * * Use the flag --allow-hrtime return a precise value. * * const t = performance.now(); * console.log(`${t} ms since start!`); */ now(): number { const res = sendSync(dispatch.OP_NOW) as NowResponse; return res.seconds * 1e3 + res.subsecNanos / 1e6; } }