Created
July 31, 2024 12:16
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Testing stream data collection methods
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| import fs from 'fs' | |
| const MAX_READ = 104_857_600 | |
| let start = process.hrtime.bigint() | |
| await plusEquals() | |
| let end = process.hrtime.bigint() | |
| const peTime = end - start | |
| console.log('plusEquals => ', peTime) | |
| start = process.hrtime.bigint() | |
| await concat() | |
| end = process.hrtime.bigint() | |
| const cTime = end - start | |
| console.log('concat => ', cTime) | |
| if (cTime < peTime) { | |
| console.log('concat is faster') | |
| } else if (peTime < cTime) { | |
| console.log('plusEquals is faster') | |
| } else { | |
| console.log('both equal') | |
| } | |
| async function plusEquals() { | |
| const { promise, resolve } = Promise.withResolvers() | |
| const fd = fs.createReadStream('/dev/urandom') | |
| let total = 0 | |
| let data | |
| fd.on('data', d => { | |
| data += d | |
| total += d.byteLength | |
| if (total >= MAX_READ) { | |
| fd.destroy() | |
| console.log(typeof data, Buffer.isBuffer(data)) | |
| resolve() | |
| } | |
| }) | |
| await promise | |
| } | |
| async function concat() { | |
| const { promise, resolve } = Promise.withResolvers() | |
| const fd = fs.createReadStream('/dev/urandom') | |
| let total = 0 | |
| let data = Buffer.alloc(0) | |
| fd.on('data', d => { | |
| data = Buffer.concat([data, d]) | |
| total += d.byteLength | |
| if (total >= MAX_READ) { | |
| fd.destroy() | |
| console.log(typeof data, Buffer.isBuffer(data)) | |
| resolve() | |
| } | |
| }) | |
| await promise | |
| } |
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