Lőrinc 0ac969cddf validation: don't reallocate cache for short-lived CCoinsViewCache ...

A few temporary `CCoinsViewCache`'s are destructed right after the `Flush()`, therefore it is not necessary to call `ReallocateCache` to recreate them right before they're killed anyway.

* `Flush()` - retains existing functionality;
* `Flush(/*will_reuse_cache=*/false)` - skips destruction and reallocation of the parent cache since it will soon go out of scope anyway;

For the `will_reuse_cache` parameter we want to see exactly which ones will reallocate memory and which won't - since both can be valid usages.

This change was based on a subset of https://github.com/bitcoin/bitcoin/pull/28945.

Co-authored-by: Martin Ankerl <martin.ankerl@gmail.com>

2025-11-02 21:40:16 +01:00

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