✨[RUM-4178] Report memory impact to Datadog

[RomanGaignault]

Motivation

We would like to see the impact of a PR on memory and detect regressions early

Changes

So I added a script to report memory performance both in datadog logs and dashboard :

I also added a section in the pr comment about memory.

Testing

• Local
• Staging
• Unit
• End to end

---

I have gone over the contributing documentation.

[cit-pr-commenter]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	157.14 KiB	157.14 KiB	0 B	0.00%	✅
Logs	56.26 KiB	56.26 KiB	0 B	0.00%	✅
Rum Slim	103.69 KiB	103.69 KiB	0 B	0.00%	✅
Worker	25.21 KiB	25.21 KiB	0 B	0.00%	✅

🚀 CPU Performance

Action Name	Base Average Cpu Time (ms)	Local Average Cpu Time (ms)	𝚫
addglobalcontext	0.002	0.001	-0.001
addaction	0.017	0.016	-0.002
adderror	0.036	0.032	-0.004
addtiming	0.001	0.001	-0.000
startview	0.923	0.837	-0.086
startstopsessionreplayrecording	0.771	0.713	-0.058
logmessage	0.006	0.005	-0.001

🧠 Memory Performance

Action Name	Base Consumption Memory (bytes)	Local Consumption Memory (bytes)	𝚫
addglobalcontext	NaN KiB	26.55 KiB	NaN KiB
addaction	NaN KiB	47.79 KiB	NaN KiB
adderror	NaN KiB	50.12 KiB	NaN KiB
addtiming	NaN KiB	9.15 KiB	NaN KiB
startview	NaN KiB	2025.89 KiB	NaN KiB
startstopsessionreplayrecording	NaN KiB	10.61 KiB	NaN KiB
logmessage	NaN KiB	60.14 KiB	NaN KiB

[RomanGaignault]

/to-staging

[dd-devflow]

🚂 Branch Integration: starting soon, merge in < 9m

Commit ee3a2a747c will soon be integrated into staging-17.

This build is going to start soon! (estimated merge in less than 9m)

Use /to-staging -c to cancel this operation!

[dd-devflow]

🚂 Branch Integration: This commit was successfully integrated

Commit ee3a2a747c has been merged into staging-17 in merge commit 2277d128da.

Check out the triggered pipeline on Gitlab 🦊

[BenoitZugmeyer]

❓ question: ‏Why do we need to wait for this?

[RomanGaignault]

/to-staging

[dd-devflow]

🚂 Branch Integration: starting soon, merge in < 0s

Commit e4b5e6f2cc will soon be integrated into staging-22.

This build is going to start soon! (estimated merge in less than 0s)

Use /to-staging -c to cancel this operation!

[dd-devflow]

🚂 Branch Integration: This commit was successfully integrated

Commit e4b5e6f2cc has been merged into staging-22 in merge commit a480bef44a.

Check out the triggered pipeline on Gitlab 🦊