fix(nuxt): initialCache: false cache not deleted

[HomWang]

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• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

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• I have updated the documentation accordingly.

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[HomWang]

nuxt/nuxt#14813

[HomWang]

Solve the problem that cache data is not deleted when initialCache is false, and there is a large amount of invalid data, which will affect performance. Data should be deleted when onUnmounted to reduce stack and improve performance

[pi0]

Hi, @516310460 sorry took long to check on this. The initial cache is disabled and removed (#8885).

Releasing data from memory is a good idea. Both from _asyncData and payload.data without cache. At this point, it might introduce unwanted regressions and we are close to the 3.0.0 release.

I have created nuxt/nuxt#15438 to not forget about this enhancement and will ping you after v3 release if interested to help on it.