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Enable V8_ENABLE_UNDEFINED_DOUBLE in the V8 GYP configuration, matching the setting added on main by 8394db3. This is a candidate for the repeated wrong-map deoptimizations in big.js reported in nodejs#66717. Preserve the existing v26 GYP settings and apply only the undefined double feature configuration. Refs: nodejs@8394db3 Refs: nodejs#66717 Signed-off-by: inoway46 <inoueyuya416@gmail.com> Assisted-by: Codex
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October 15, 2026 02:22
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Enable
V8_ENABLE_UNDEFINED_DOUBLEin the V8 GYP configuration, matching the setting added on main by 8394db37d800.A macOS arm64 before/after comparison confirmed that the reproduction from #66717 no longer exhibits repeated wrong-map deoptimizations, both with and without Maglev.
results: https://github.com/inoway46/node/actions/runs/38592855428
Refs: #66717