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d43b43ca78
Instead of using core/snapshot_creator.rs, instead two crates are introduced which allow building the snapshot during build.rs. Rollup is removed and replaced with our own bundler. This removes the Node build dependency. Modules in //js now use Deno-style imports with file extensions, rather than Node style extensionless imports. This improves incremental build time when changes are made to //js files by about 40 seconds.
22 lines
623 B
TypeScript
22 lines
623 B
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import * as dispatch from "./dispatch.ts";
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import { sendSync } from "./dispatch_json.ts";
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interface NowResponse {
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seconds: number;
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subsecNanos: number;
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}
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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 res = sendSync(dispatch.OP_NOW) as NowResponse;
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return res.seconds * 1e3 + res.subsecNanos / 1e6;
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}
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}
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