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Improve cache eviction policy for LoadedPrograms (solana-labs#34391)
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* Use 2's random selection to evict program cache

* implement decaying of usage counter

* replace RwLock with AtomicU64

* address review comments

* remove -> swap_remove
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@pgarg66
pgarg66 authored Dec 18, 2023
1 parent eb948b1 commit 6f0133b
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