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Title: POC: Memory profiler allocation labels by rudolf · Pull Request #62649 · nodejs/node · GitHub

Open Graph Title: POC: Memory profiler allocation labels by rudolf · Pull Request #62649 · nodejs/node

X Title: POC: Memory profiler allocation labels by rudolf · Pull Request #62649 · nodejs/node

Description: Node.js JavaScript runtime ✨🐢🚀✨. Contribute to nodejs/node development by creating an account on GitHub.

Open Graph Description: This is a POC for initial feedback. If we can get alignment within Node.js I could try to contribute the v8 changes upstream. Summary Adds the ability to tag sampling heap profiler allocations with...

X Description: This is a POC for initial feedback. If we can get alignment within Node.js I could try to contribute the v8 changes upstream. Summary Adds the ability to tag sampling heap profiler allocations with...

Opengraph URL: https://github.com/nodejs/node/pull/62649

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Apr 20, 2026 https://github.com/nodejs/node/pull/62649#pullrequestreview-4140004428
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lib/v8.jshttps://github.com/nodejs/node/pull/62649/files/da6af2885d48a5ab1d59f4d3ecc52824f332d462#diff-51492e7c14e4e509508448c9a83da28992db583c633fd3be6ba933bbdd7a22c1
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Apr 21, 2026https://github.com/nodejs/node/pull/62649#issuecomment-4288268322
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like thishttps://github.com/DataDog/pprof-nodejs/blob/main/bindings/profilers/wall.cc#L1261-L1278
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v8::CpuProfiler::GetSampleTimestamphttps://v8docs.nodesource.com/node-22.4/db/d79/classv8_1_1_cpu_profile.html#aa1a567a411216e7030ac3e96064398ba
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April 23, 2026 22:15https://github.com/nodejs/node/pull/62649#commits-pushed-b24f8d9
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benchmark: add getAllocationProfile label resolution benchmarkhttps://github.com/nodejs/node/pull/62649/commits/b24f8d9d7cb907715e7d01b5dc6a29e32fc476eb
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src: fix heap profile labels init order and buildhttps://github.com/nodejs/node/pull/62649/commits/6fb8f121b3bbcbc18a2cff8a1c3d426dab5cae5c
6fb8f12https://github.com/nodejs/node/pull/62649/commits/6fb8f121b3bbcbc18a2cff8a1c3d426dab5cae5c
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deps: cache label resolution in GetAllocationProfilehttps://github.com/nodejs/node/pull/62649/commits/a6391ec1e2bb226c3a585e1b5deb52f179ccad6f
a6391echttps://github.com/nodejs/node/pull/62649/commits/a6391ec1e2bb226c3a585e1b5deb52f179ccad6f
nodejs#62649 (comment)https://github.com/nodejs/node/pull/62649#discussion_r3110646647
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Apr 25, 2026https://github.com/nodejs/node/pull/62649#issuecomment-4317524531
like thishttps://github.com/DataDog/pprof-nodejs/blob/main/bindings/profilers/wall.cc#L1261-L1278
reimplementationhttps://github.com/DataDog/pprof-nodejs/blob/main/bindings/map-get.cc
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