dgram: improve get-send-queue-info performance

[IlyasShabi]

Improve dgram getSendQueueSize and getSendQueueCount performance by using V8 fast API.

Local benchmark:

                                                      confidence improvement accuracy (*)   (**)  (***)
dgram/get-send-queue-info.js method='count' n=5000000        ***    127.63 %       ±1.01% ±1.35% ±1.77%
dgram/get-send-queue-info.js method='size' n=5000000         ***    127.77 %       ±2.18% ±2.92% ±3.86%

[nodejs-github-bot]

Review requested:

• @nodejs/net
• @nodejs/performance

[codecov]

Codecov Report

❌ Patch coverage is 47.82609% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.53%. Comparing base (dbe45b7) to head (49d0d65).

Files with missing lines	Patch %	Lines
src/udp_wrap.cc	47.82%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #59054      +/-   ##
==========================================
- Coverage   88.54%   88.53%   -0.01%     
==========================================
  Files         704      704              
  Lines      207843   207863      +20     
  Branches    40044    40049       +5     
==========================================
+ Hits       184028   184035       +7     
+ Misses      15858    15856       -2     
- Partials     7957     7972      +15     

Files with missing lines	Coverage Δ
src/udp_wrap.h	100.00% <ø> (ø)
src/udp_wrap.cc	76.86% <47.82%> (-1.43%)	⬇️

... and 34 files with indirect coverage changes

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[RafaelGSS]

I think at some point this will be JIT-eliminated

[IlyasShabi]

I think that getSendQueueSize() will not be JIT eliminated because it still calls into libuv. Im using size and count now to accumulate the results in order to make that explicit

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/67989/

[RafaelGSS]

nevermind, I was looking to HEAD.

[nodejs-github-bot]

Commit Queue failed

- Loading data for nodejs/node/pull/59054
✔  Done loading data for nodejs/node/pull/59054
----------------------------------- PR info ------------------------------------
Title      dgram: improve get-send-queue-info performance (#59054)
Author     Ilyas Shabi <[email protected]> (@IlyasShabi)
Branch     IlyasShabi:ishabi/get-send-queue-info -> nodejs:main
Labels     dgram, c++, author ready, needs-ci
Commits    3
 - dgram: improve get-send-queue-info performance
 - keep packets unsent to have data in getters
 - fix benchmark test
Committers 1
 - ishabi <[email protected]>
PR-URL: https://github.com/nodejs/node/pull/59054
Reviewed-By: Rafael Gonzaga <[email protected]>
Reviewed-By: James M Snell <[email protected]>
------------------------------ Generated metadata ------------------------------
PR-URL: https://github.com/nodejs/node/pull/59054
Reviewed-By: Rafael Gonzaga <[email protected]>
Reviewed-By: James M Snell <[email protected]>
--------------------------------------------------------------------------------
   ℹ  This PR was created on Sun, 13 Jul 2025 22:32:01 GMT
   ✔  Approvals: 2
   ✔  - Rafael Gonzaga (@RafaelGSS) (TSC): https://github.com/nodejs/node/pull/59054#pullrequestreview-3031186521
   ✔  - James M Snell (@jasnell) (TSC): https://github.com/nodejs/node/pull/59054#pullrequestreview-3038885029
   ✔  Last GitHub CI successful
   ℹ  Last Full PR CI on 2025-07-17T21:21:09Z: https://ci.nodejs.org/job/node-test-pull-request/67989/
   ⚠  Commits were pushed after the last Full PR CI run:
   ⚠  - dgram: improve get-send-queue-info performance
   ⚠  - keep packets unsent to have data in getters
   ⚠  - fix benchmark test
- Querying data for job/node-test-pull-request/67989/
   ✔  Last Jenkins CI successful
--------------------------------------------------------------------------------
   ✔  Aborted `git node land` session in /home/runner/work/node/node/.ncu

https://github.com/nodejs/node/actions/runs/16423922247

[H4ad]

I think it would be safer to test on fastApi as well, would you mind adding a test for it? You can use this one as example: https://github.com/nodejs/node/blob/cd0c5159e64353bc057c5704767145b46887c735/test/parallel/test-os-fast.js

Just a little reminder, you need to wrap your function during the test (testFastOs in the example above) to pass that function to the v8 optimize, it fails if you try to optimize your new method directly.

[H4ad]

You also need to update the first commit message to reflect the new change: add fast api for get-send-queue-size method

[aduh95]

Benchmark CI: https://github.com/aduh95/node/actions/runs/18478104954
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1741/

                                                                     confidence improvement accuracy (*)    (**)   (***)
dgram/get-send-queue-info.js method='count' n=5000000                       ***     33.55 %       ±6.16%  ±8.13% ±10.44%
dgram/get-send-queue-info.js method='size' n=5000000                        ***     34.50 %       ±6.13%  ±8.08% ±10.37%

[anonrig]

good work

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/69717/