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2235dd795d
* Revert "port more ops to JSON (#2809)" This reverts commit137f33733d. * Revert "port ops to JSON: compiler, errors, fetch, files (#2804)" This reverts commit79f82cf10e. * Revert "Port rest of os ops to JSON (#2802)" This reverts commit5b2baa5c99.
22 lines
805 B
TypeScript
22 lines
805 B
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import { sendSync, msg, flatbuffers } from "./dispatch_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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