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25 lines
1.1 KiB
Go
25 lines
1.1 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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// Package lru provides three different LRU caches of varying sophistication.
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//
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// Cache is a simple LRU cache. It is based on the LRU implementation in
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// groupcache: https://github.com/golang/groupcache/tree/master/lru
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//
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// TwoQueueCache tracks frequently used and recently used entries separately.
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// This avoids a burst of accesses from taking out frequently used entries, at
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// the cost of about 2x computational overhead and some extra bookkeeping.
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//
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// ARCCache is an adaptive replacement cache. It tracks recent evictions as well
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// as recent usage in both the frequent and recent caches. Its computational
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// overhead is comparable to TwoQueueCache, but the memory overhead is linear
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// with the size of the cache.
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//
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// ARC has been patented by IBM, so do not use it if that is problematic for
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// your program. For this reason, it is in a separate go module contained within
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// this repository.
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//
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// All caches in this package take locks while operating, and are therefore
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// thread-safe for consumers.
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package lru
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