https://github.com/marcbachmann/hrtime-milliseconds

Calculates a diff in milliseconds between invocations.
https://github.com/marcbachmann/hrtime-milliseconds

Last synced: 27 days ago
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Calculates a diff in milliseconds between invocations.

• Host: GitHub
• URL: https://github.com/marcbachmann/hrtime-milliseconds
• Owner: marcbachmann
• Created: 2017-06-26T20:19:42.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2023-12-15T14:53:41.000Z (11 months ago)
• Last Synced: 2024-10-12T18:08:39.540Z (about 1 month ago)
• Language: JavaScript
• Homepage:
• Size: 12.7 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        

# hrtime-milliseconds

Calculates a diff in milliseconds between invocations. Originally I wanted to use `process.hrtime`, but it looks like `Date.now` is faster since it doesn't need any conversion.

### Usage

```

const start = require('hrtime-milliseconds')

// Create an instance

const diff = start()

// Then invoke the returned function to get the time since its' creation

// It returns an integer that defines how many milliseconds passed (here it's 0 as we're in the same tick)

console.log(diff())

setTimeout(function () {

  // second invocation returns new diff since start, so we'll see 100

  console.log(diff())

}, 100)

```

In case you need nanosecond precision, please use https://github.com/sindresorhus/time-span.

### Benchmark

```

NANOBENCH version 2

> /Users/marcbachmann/.nvm/versions/node/v8.1.2/bin/node bench.js

# 10 million operations using Date.now

ok ~1.74 s (1 s + 740748587 ns)

# 10 million using wrapped process.hrtime

ok ~1.99 s (1 s + 985111399 ns)

# 10 million operations directly using process.hrtime, without conversion

ok ~1.54 s (1 s + 540457122 ns)

all benchmarks completed

ok ~5.27 s (5 s + 266317108 ns)

```