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24 lines
867 B
TypeScript
24 lines
867 B
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import * as msg from "gen/cli/msg_generated";
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import { sendSync } from "./dispatch";
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import * as flatbuffers from "./flatbuffers";
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import { assert } from "./util";
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export class Performance {
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/** Returns a current time from Deno's start in milliseconds.
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*
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* Use the flag --allow-hrtime return a precise value.
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*
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* const t = performance.now();
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* console.log(`${t} ms since start!`);
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*/
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now(): number {
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const builder = flatbuffers.createBuilder();
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const inner = msg.Now.createNow(builder);
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const baseRes = sendSync(builder, msg.Any.Now, inner)!;
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assert(msg.Any.NowRes === baseRes.innerType());
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const res = new msg.NowRes();
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assert(baseRes.inner(res) != null);
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return res.seconds().toFloat64() * 1e3 + res.subsecNanos() / 1e6;
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}
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}
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