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cloudflared-mirror/vendor/github.com/cloudflare/golibs/lrucache/README.md

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LRU Cache

A golang implementation of last recently used cache data structure.

To install:

go get github.com/cloudflare/golibs/lrucache

To test:

cd $GOPATH/src/github.com/cloudflare/golibs/lrucache
make test

For coverage:

make cover

Basic benchmarks:

$ make bench  # As tested on my two core i5
[*] Scalability of cache/lrucache
[ ] Operations in shared cache using one core
BenchmarkConcurrentGetLRUCache       5000000               450 ns/op
BenchmarkConcurrentSetLRUCache       2000000               821 ns/op
BenchmarkConcurrentSetNXLRUCache     5000000               664 ns/op

[*] Scalability of cache/multilru
[ ] Operations in four caches using four cores
BenchmarkConcurrentGetMultiLRU-4     5000000               475 ns/op
BenchmarkConcurrentSetMultiLRU-4     2000000               809 ns/op
BenchmarkConcurrentSetNXMultiLRU-4   5000000               643 ns/op

[*] Capacity=4096 Keys=30000 KeySpace=15625
            vitess          LRUCache        MultiLRUCache-4
create      1.709us         1.626374ms      343.54us
Get (miss)  144.266083ms    132.470397ms    177.277193ms
SetNX #1    338.637977ms    380.733302ms    411.709204ms
Get (hit)   195.896066ms    173.252112ms    234.109494ms
SetNX #2    349.785951ms    367.255624ms    419.129127ms