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Description
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Our business process has an upper limit baseline requirement，currently switching to a new version of node.js results in an increase in memory.node version v18.14.1 vs v14.21.3, the memory of the same sample code increased by about 10mb.
Why did this happen, and what factors？
Node.js version
18.14.1
Example code
The sample code indexTest.js as follows:
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => {
res.send('Hello World!')
})
app.listen(port, () => {
console.log(`Example app listening on port ${port}`);
console.info(`process info: rss ${(pro.rss / 1048576).toFixed(2)}MB heapTotal ${(pro.heapTotal / 1048576).toFixed(2)}MB heapUsed ${(pro.heapUsed / 1048576).toFixed(2)}MB external ${(pro.external / 1048576).toFixed(2)}MB`);
})
With express 4.18.1 we use the command: ./node indexTest.js
we can see memory performance information is as follows:
node v14.21.3
root@DESKTOP-TKJT03L:/opt/nodejsTest/node-14# ./node indexTest.js
Example app listening on port 3000
process info: rss 42.95MB heapTotal 10.33MB heapUsed 6.70MB external 1.47MB
process info: rss 42.95MB heapTotal 10.33MB heapUsed 6.71MB external 1.47MB
process info: rss 42.95MB heapTotal 10.33MB heapUsed 6.71MB external 1.47MB
process info: rss 42.95MB heapTotal 10.33MB heapUsed 6.71MB external 1.47MB
process info: rss 39.43MB heapTotal 6.70MB heapUsed 4.83MB external 1.39MB
process info: rss 39.43MB heapTotal 6.70MB heapUsed 4.85MB external 1.39MB
process info: rss 39.43MB heapTotal 6.70MB heapUsed 4.85MB external 1.39MB
process info: rss 39.43MB heapTotal 6.70MB heapUsed 4.86MB external 1.39MB
node v18.14.1
root@DESKTOP-TKJT03L:/opt/nodejsTest/node-14# ./node indexTest.js
Example app listening on port 3000
root@DESKTOP-TKJT03L:/opt/nodejsTest/node-18# ./node indexTest.js
Example app listening on port 3000
process info: rss 54.73MB heapTotal 11.84MB heapUsed 8.70MB external 0.75MB
process info: rss 54.73MB heapTotal 11.84MB heapUsed 8.71MB external 0.75MB
process info: rss 54.73MB heapTotal 11.84MB heapUsed 8.71MB external 0.75MB
process info: rss 54.73MB heapTotal 11.84MB heapUsed 8.71MB external 0.75MB
process info: rss 51.95MB heapTotal 9.09MB heapUsed 7.17MB external 0.72MB
process info: rss 51.95MB heapTotal 9.09MB heapUsed 7.37MB external 0.72MB
process info: rss 51.95MB heapTotal 9.09MB heapUsed 7.43MB external 0.72MB
process info: rss 51.95MB heapTotal 9.09MB heapUsed 7.44MB external 0.72MB
process info: rss 51.95MB heapTotal 9.09MB heapUsed 7.44MB external 0.72MB
Operating system
Ubuntu 18.04.5
kernel version is 5.10.16.3
Scope
other
Module and version
Not applicable.