René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Backport Windows PGO + ThinLTO from main to v24 LTO builds for builds (x64 and Arm64)","articleBody":"### What is the problem this feature will solve?\n\nImprove performance of Windows builds by 15% by backporting the perf improvements brought through PGO and ThinLTO enablement, from v26 to v24 LTS releases. \n\nSee issue #61964 for work description for the v26 changes. \nSeparate perf suite results are here \nThinLTO: https://github.com/JaneaSystems/node-thin-lto-perf\nPGO: https://github.com/JaneaSystems/node-pgo-perf\n\n\n### What is the feature you are proposing to solve the problem?\n\nBackport the relevant PRs (and related config changes the the build):\n\n- [nodejs/node] Enable PGO for Windows builds (x64 and Arm64) (I #61964)\n- [nodejs/node] build,win: enable PGO and LTO for Windows builds (PR #62761)\n- [nodejs/node] build,win: build,win: replace LTCG with Thin LTO for releases (PR #63114)\n- [nodejs/node] build,win: fix VS2022 arm64 PGO build (PR #63413)\n- [nodejs/node] build,win: add PGO workload scripts (PR #63696)\n\n### What alternatives have you considered?\n\nnone","author":{"url":"https://github.com/marcpems","@type":"Person","name":"marcpems"},"datePublished":"2026-08-21T10:39:39Z","url":"https://github.com/nodejs/node/issues/65452"}