node22 performance degradation about node HOT 7 OPEN

Maybe related to #51360

from node.

@nodejs/performance

from node.

@FishOrBear What are you running this on? Your numbers appear to be very, very high.

I do not see a regression. What I see on this test is that Node 20 had much better performance on this particular test, but it went away soon after.

Here are my results on a macbook...

Bun

[12.89ms] j
[8.05ms] j
[7.32ms] j
[6.83ms] j
[6.37ms] j
[5.95ms] j
[5.77ms] j
[5.52ms] j
[5.34ms] j
[5.16ms] j
[5.07ms] j
[4.90ms] j
[4.87ms] j
[4.79ms] j
[4.99ms] j
[4.76ms] j
[4.69ms] j
[4.81ms] j
[4.73ms] j
[4.70ms] j

Node 22

 node issue.js
j: 6.7ms
j: 4.991ms
j: 4.909ms
j: 4.694ms
j: 4.692ms
j: 4.47ms
j: 4.477ms
j: 4.377ms
j: 4.249ms
j: 4.314ms
j: 4.551ms
j: 4.311ms
j: 4.288ms
j: 4.378ms
j: 4.418ms
j: 4.246ms
j: 4.281ms
j: 4.372ms
j: 4.384ms
j: 4.248ms

Node 21...

node issue.js
j: 7.221ms
j: 5.245ms
j: 5.057ms
j: 5.02ms
j: 4.848ms
j: 4.645ms
j: 4.684ms
j: 4.57ms
j: 4.436ms
j: 4.489ms
j: 4.638ms
j: 4.475ms
j: 4.467ms
j: 4.599ms
j: 4.578ms
j: 4.405ms
j: 4.418ms
j: 4.651ms
j: 4.483ms
j: 4.405ms

Node 20

j: 9.254ms
j: 6.872ms
j: 4.039ms
j: 3.949ms
j: 3.861ms
j: 3.748ms
j: 3.727ms
j: 3.618ms
j: 3.599ms
j: 3.925ms
j: 3.544ms
j: 3.425ms
j: 3.521ms
j: 3.56ms
j: 3.522ms
j: 3.422ms
j: 3.47ms
j: 3.589ms
j: 3.559ms
j: 3.476ms

Node 19

j: 7.636ms
j: 5.37ms
j: 5.496ms
j: 5.431ms
j: 5.442ms
j: 4.993ms
j: 5.244ms
j: 4.796ms
j: 4.836ms
j: 4.578ms
j: 4.475ms
j: 4.59ms
j: 4.716ms
j: 4.499ms
j: 4.592ms
j: 4.571ms
j: 4.588ms
j: 4.454ms
j: 4.547ms
j: 4.9ms

Node 18

  node issue.js
j: 10.643ms
j: 6.794ms
j: 6.516ms
j: 6.421ms
j: 6.46ms
j: 4.704ms
j: 4.814ms
j: 4.631ms
j: 4.505ms
j: 4.637ms
j: 4.8ms
j: 4.584ms
j: 4.518ms
j: 4.754ms
j: 4.645ms
j: 4.492ms
j: 4.605ms
j: 4.763ms
j: 4.568ms
j: 4.51ms

Node 17

j: 9.578ms
j: 6.67ms
j: 6.423ms
j: 6.232ms
j: 6.258ms
j: 6.004ms
j: 4.501ms
j: 4.758ms
j: 4.603ms
j: 4.539ms
j: 4.605ms
j: 4.793ms
j: 4.521ms
j: 4.512ms
j: 4.73ms
j: 4.598ms
j: 4.524ms
j: 4.571ms
j: 4.682ms
j: 4.56ms

Node 16

j: 7.864ms
j: 5.231ms
j: 5.038ms
j: 4.87ms
j: 4.777ms
j: 4.594ms
j: 4.698ms
j: 4.709ms
j: 4.546ms
j: 4.444ms
j: 4.498ms
j: 4.701ms
j: 4.53ms
j: 4.7ms
j: 4.635ms
j: 4.676ms
j: 4.427ms
j: 4.504ms
j: 4.68ms
j: 4.429ms

Node 10

j: 14.909ms
j: 5.316ms
j: 4.624ms
j: 4.854ms
j: 4.679ms
j: 6.734ms
j: 5.198ms
j: 5.218ms
j: 5.150ms
j: 5.224ms
j: 4.984ms
j: 5.020ms
j: 5.276ms
j: 4.999ms
j: 5.492ms
j: 5.013ms
j: 5.031ms
j: 5.218ms
j: 5.084ms
j: 4.990ms

I think we need more tests to verify the issue.

cc @RafaelGSS @anonrig

from node.

Unless there is something specific about buffers, this has nothing to do with Node.js, but it's rather a V8 change.

from node.

@FishOrBear What are you running this on? Your numbers appear to be very, very high.

I do not see a regression. What I see on this test is that Node 20 had much better performance on this particular test, but it went away soon after.

Here are my results on a macbook...

Bun

[12.89ms] j
[8.05ms] j
[7.32ms] j
[6.83ms] j
[6.37ms] j
[5.95ms] j
[5.77ms] j
[5.52ms] j
[5.34ms] j
[5.16ms] j
[5.07ms] j
[4.90ms] j
[4.87ms] j
[4.79ms] j
[4.99ms] j
[4.76ms] j
[4.69ms] j
[4.81ms] j
[4.73ms] j
[4.70ms] j

Node 22

 node issue.js
j: 6.7ms
j: 4.991ms
j: 4.909ms
j: 4.694ms
j: 4.692ms
j: 4.47ms
j: 4.477ms
j: 4.377ms
j: 4.249ms
j: 4.314ms
j: 4.551ms
j: 4.311ms
j: 4.288ms
j: 4.378ms
j: 4.418ms
j: 4.246ms
j: 4.281ms
j: 4.372ms
j: 4.384ms
j: 4.248ms

Node 21...

node issue.js
j: 7.221ms
j: 5.245ms
j: 5.057ms
j: 5.02ms
j: 4.848ms
j: 4.645ms
j: 4.684ms
j: 4.57ms
j: 4.436ms
j: 4.489ms
j: 4.638ms
j: 4.475ms
j: 4.467ms
j: 4.599ms
j: 4.578ms
j: 4.405ms
j: 4.418ms
j: 4.651ms
j: 4.483ms
j: 4.405ms

Node 20

j: 9.254ms
j: 6.872ms
j: 4.039ms
j: 3.949ms
j: 3.861ms
j: 3.748ms
j: 3.727ms
j: 3.618ms
j: 3.599ms
j: 3.925ms
j: 3.544ms
j: 3.425ms
j: 3.521ms
j: 3.56ms
j: 3.522ms
j: 3.422ms
j: 3.47ms
j: 3.589ms
j: 3.559ms
j: 3.476ms

Node 19

j: 7.636ms
j: 5.37ms
j: 5.496ms
j: 5.431ms
j: 5.442ms
j: 4.993ms
j: 5.244ms
j: 4.796ms
j: 4.836ms
j: 4.578ms
j: 4.475ms
j: 4.59ms
j: 4.716ms
j: 4.499ms
j: 4.592ms
j: 4.571ms
j: 4.588ms
j: 4.454ms
j: 4.547ms
j: 4.9ms

Node 18

  node issue.js
j: 10.643ms
j: 6.794ms
j: 6.516ms
j: 6.421ms
j: 6.46ms
j: 4.704ms
j: 4.814ms
j: 4.631ms
j: 4.505ms
j: 4.637ms
j: 4.8ms
j: 4.584ms
j: 4.518ms
j: 4.754ms
j: 4.645ms
j: 4.492ms
j: 4.605ms
j: 4.763ms
j: 4.568ms
j: 4.51ms

Node 17

j: 9.578ms
j: 6.67ms
j: 6.423ms
j: 6.232ms
j: 6.258ms
j: 6.004ms
j: 4.501ms
j: 4.758ms
j: 4.603ms
j: 4.539ms
j: 4.605ms
j: 4.793ms
j: 4.521ms
j: 4.512ms
j: 4.73ms
j: 4.598ms
j: 4.524ms
j: 4.571ms
j: 4.682ms
j: 4.56ms

Node 16

j: 7.864ms
j: 5.231ms
j: 5.038ms
j: 4.87ms
j: 4.777ms
j: 4.594ms
j: 4.698ms
j: 4.709ms
j: 4.546ms
j: 4.444ms
j: 4.498ms
j: 4.701ms
j: 4.53ms
j: 4.7ms
j: 4.635ms
j: 4.676ms
j: 4.427ms
j: 4.504ms
j: 4.68ms
j: 4.429ms

Node 10

j: 14.909ms
j: 5.316ms
j: 4.624ms
j: 4.854ms
j: 4.679ms
j: 6.734ms
j: 5.198ms
j: 5.218ms
j: 5.150ms
j: 5.224ms
j: 4.984ms
j: 5.020ms
j: 5.276ms
j: 4.999ms
j: 5.492ms
j: 5.013ms
j: 5.031ms
j: 5.218ms
j: 5.084ms
j: 4.990ms

I think we need more tests to verify the issue.

cc @RafaelGSS @anonrig

I'm running it on an older cpu and your macbook performs well.
cpu:Intel(R) Celeron(R) CPU J3455 @ 1.50GHz

from node.

The JavaScript engine v8 was updated to 11.3 with Node 20, it was upgraded again to 11.8 with Node 20. Node 19 had v8 10.7.

Regarding the possibility that it could be #51360... maglev was introduced in Node 22, but you see a performance difference between Node 20 and Node 21. So my numbers do not point at a regression caused by maglev.

from node.

Unless there is something specific about buffers, this has nothing to do with Node.js, but it's rather a V8 change.

Buffers are just Uint8Arrays now, so if this reproduces with Uint8Array, this is more likely an V8 issue (especially if it reproduces with different versions of d8)

from node.