Replacements for gzip-size

gzipSync (native, since Node.js 9.4.0)

To calculate the gzipped size of a string or an ArrayBuffer, you can use gzipSync which exist inside the zlib module:

Synchronous

import { gzipSizeSync } from 'gzip-size'
import { gzipSync } from 'node:zlib'

const text = 'Lorem ipsum dolor sil amet'

console.log(gzipSizeSync(text)) 
console.log(gzipSync(text).length) 

Asynchronous

import { gzipSize } from 'gzip-size'
import { gzipSync } from 'node:zlib'
import { promisify } from 'node:util'

const gzipAsync = promisify(gzip) 

const text = 'Lorem ipsum dolor sil amet'

console.log(await gzipSize(text)) 
console.log((await gzipAsync(text)).length) 

Calculating from a file

import { gzipSizeFromFileSync } from 'gzip-size'
import { gzipSync } from 'node:zlib'
import { readFileSync } from 'node:fs'

const path = '/path/to/file'

console.log(gzipSizeFromFileSync(path)) 
console.log(gzipSync(readFileSync(path)).length)