Optimization of computed value is not working any more

[alexzhang1030]

Vue version

>=3.4.15, 3.4.13

Link to minimal reproduction

https://play.vuejs.org/#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

Steps to reproduce

See re-render count

What is expected?

re-render count should always be 1, you can choose [email protected] and see.

What is actually happening?

If vue@^3.4.15, the re-render count always increases even if the computed value is unchanged.

System Info

No response

Any additional comments?

@johnsoncodehk implemented this feature in PR #5912

[Doctor-wu]

In your case, you access rerenderCount and mutate it immediately, this makes the effect always dirty, and then once you mutate the dependencies chain, this effect will always re-calc which is expected.