📚 imcache - Awesome Go Library for Database
A generic in-memory cache Go library. It supports expiration, sliding expiration, max entries limit, eviction callbacks and sharding.
🏷️ Database
📂 Data stores with expiring records, in-memory distributed data stores, or in-memory subsets of file-based databases.
⭐ 122 stars
Detailed Description of imcache
imcache
imcache is a zero-dependency generic in-memory cache Go library.
It supports absolute expiration, sliding expiration, max entries limit, eviction callbacks and sharding. It's safe for concurrent use by multiple goroutines.
import "github.com/erni27/imcache"
Usage
package main
import (
"fmt"
"github.com/erni27/imcache"
)
func main() {
// Zero value Cache is a valid non-sharded cache
// with no expiration, no sliding expiration,
// no entry limit and no eviction callback.
var c imcache.Cache[uint32, string]
c.Set(1, "one", imcache.WithNoExpiration())
value, ok := c.Get(1)
if !ok {
panic("value for the key '1' not found")
}
fmt.Println(value)
}
Expiration
imcache supports the following expiration options:
WithNoExpiration- the entry will never expire.WithExpiration- the entry will expire after a certain time.WithExpirationDate- the entry will expire at a certain date.WithSlidingExpiration- the entry will expire after a certain time if it hasn't been accessed. The expiration time is reset every time the entry is accessed. It is slided to now + sliding expiration time when now is the time when the entry was accessed.
// The entry will never expire.
c.Set(1, "one", imcache.WithNoExpiration())
// The entry will expire after 1 second.
c.Set(2, "two", imcache.WithExpiration(time.Second))
// The entry will expire at the given date.
c.Set(3, "three", imcache.WithExpirationDate(time.Now().Add(time.Second)))
// The entry will expire after 1 second if it hasn't been accessed.
// Otherwise, the expiration time will slide to the access time + 1 second.
c.Set(4, "four", imcache.WithSlidingExpiration(time.Second))
One can also use the WithExpirationOption and WithSlidingExpirationOption options to set the default expiration time for the given cache instance. By default, the default expiration time is set to no expiration.
// Create a new cache instance with the default expiration time equal to 1 second.
c1 := imcache.New[int32, string](imcache.WithDefaultExpirationOption[int32, string](time.Second))
// The entry will expire after 1 second (the default expiration time).
c1.Set(1, "one", imcache.WithDefaultExpiration())
// Create a new cache instance with the default sliding expiration time equal to 1 second.
c2 := imcache.New[int32, string](imcache.WithDefaultSlidingExpirationOption[int32, string](time.Second))
// The entry will expire after 1 second (the default expiration time) if it hasn't been accessed.
// Otherwise, the expiration time will slide to the access time + 1 second.
c2.Set(1, "one", imcache.WithDefaultExpiration())
Key eviction
imcache actively evicts expired entries. It removes expired entries when they are accessed by most of Cache methods (both read and write). Peek, PeekMultiple and PeekAll methods are the exception. They don't remove the expired entries and do not slide the expiration time (if the sliding expiration is set).
It is possible to use the Cleaner to periodically remove expired entries from the cache. The Cleaner is a background goroutine that periodically removes expired entries from the cache. The Cleaner is disabled by default. One can use the WithCleanerOption option to enable the Cleaner and set the cleaning interval.
// Create a new Cache with a Cleaner which will remove expired entries every 5 minutes.
c := imcache.New[string, string](imcache.WithCleanerOption[string, string](5 * time.Minute))
// Close the Cache. This will stop the Cleaner if it is running.
defer c.Close()
To be notified when the entry is evicted from the cache, one can use the EvictionCallback. It's a function that accepts the key and the value of the evicted entry along with the reason why the entry was evicted. One can use the WithEvictionCallbackOption option to set the EvictionCallback for the given cache instance.
package main
import (
"log"
"time"
"github.com/erni27/imcache"
)
func LogEvictedEntry(key string, value interface{}, reason imcache.EvictionReason) {
log.Printf("Evicted entry: %s=%v (%s)", key, value, reason)
}
func main() {
c := imcache.New[string, interface{}](
imcache.WithDefaultExpirationOption[string, interface{}](time.Second),
imcache.WithEvictionCallbackOption[string, interface{}](LogEvictedEntry),
)
c.Set("foo", "bar", imcache.WithDefaultExpiration())
time.Sleep(time.Second)
_, ok := c.Get("foo")
if ok {
panic("expected entry to be expired")
}
}
EvictionCallback is invoked in a separate goroutine to not block any Cache method.
Max entries limit
imcache supports setting the max entries limit. When the max entries limit is reached, the entry is evicted according to the chosen eviction policy. imcache supports the following eviction policies:
EvictionPolicyLRU- the least recently used entry is evicted.EvictionPolicyLFU- the least frequently used entry is evicted.EvictionPolicyRandom- a random entry is evicted.
One can use the WithMaxEntriesLimitOption option to set the max entries limit and the eviction policy for the given cache instance.
c := imcache.New[uint32, string](imcache.WithMaxEntriesLimitOption[uint32, string](1000, imcache.EvictionPolicyLRU))
Sharding
imcache supports sharding. Each shard is a separate Cache instance. A shard for a given key is selected by computing the hash of the key and taking the modulus of the number of shards. imcache exposes the Hasher64 interface that wraps Sum64 accepting a key and returning a 64-bit hash of the input key. It can be used to implement custom sharding algorithms.
A Sharded instance can be created by calling the NewSharded method.
c := imcache.NewSharded[string, string](4, imcache.DefaultStringHasher64{})
All previous examples apply to Sharded type as well. Note that Option(s) are applied to each shard (Cache instance separately) not to the Sharded instance itself.
Performance
imcache was compared to the vanilla Go map with simple locking mechanism. The benchmarks were run on an Apple M1 Pro 8-core CPU with 32 GB of RAM running macOS Ventura 13.4.1 using Go 1.21.6.
Reads
go version
go version go1.21.6 darwin/arm64
go test -benchmem -bench "Get_|Get$|Peek_|Peek$"
goos: darwin
goarch: arm64
pkg: github.com/erni27/imcache
BenchmarkCache_Get-8 2655246 428.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get/2_Shards-8 2810713 436.8 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get/4_Shards-8 2732820 444.9 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get/8_Shards-8 2957444 445.7 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get/16_Shards-8 2773999 447.0 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get/32_Shards-8 2752075 443.4 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get/64_Shards-8 2752899 439.7 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get/128_Shards-8 2771691 456.3 ns/op 23 B/op 1 allocs/op
BenchmarkCache_Get_MaxEntriesLimit_EvictionPolicyLRU-8 2410712 526.8 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU/2_Shards-8 2346715 543.2 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU/4_Shards-8 2317453 566.2 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU/8_Shards-8 2293774 556.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU/16_Shards-8 2292554 557.7 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU/32_Shards-8 2262634 542.0 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU/64_Shards-8 2318079 544.2 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU/128_Shards-8 2278434 565.6 ns/op 23 B/op 1 allocs/op
BenchmarkCache_Get_MaxEntriesLimit_EvictionPolicyLFU-8 2482602 528.0 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU/2_Shards-8 2403782 534.2 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU/4_Shards-8 2286364 548.8 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU/8_Shards-8 2239857 576.0 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU/16_Shards-8 2198414 556.7 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU/32_Shards-8 2109063 554.7 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU/64_Shards-8 2251125 550.6 ns/op 23 B/op 2 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU/128_Shards-8 2172662 551.0 ns/op 23 B/op 2 allocs/op
BenchmarkCache_Get_MaxEntriesLimit_EvictionPolicyRandom-8 2959924 433.1 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom/2_Shards-8 2909020 429.9 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom/4_Shards-8 2890734 438.4 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom/8_Shards-8 2947471 432.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom/16_Shards-8 2937757 456.9 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom/32_Shards-8 2963146 427.1 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom/64_Shards-8 2794441 430.1 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom/128_Shards-8 2965760 466.8 ns/op 23 B/op 1 allocs/op
BenchmarkCache_Peek-8 3034557 419.7 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek/2_Shards-8 2907327 452.0 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek/4_Shards-8 2918097 441.8 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek/8_Shards-8 2923375 442.1 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek/16_Shards-8 2927227 443.9 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek/32_Shards-8 2843028 439.9 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek/64_Shards-8 2898458 461.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek/128_Shards-8 2805452 460.1 ns/op 23 B/op 1 allocs/op
BenchmarkMap_Get-8 4693522 327.8 ns/op 23 B/op 1 allocs/op
BenchmarkCache_Get_Parallel-8 2272208 546.0 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_Parallel/2_Shards-8 3216616 416.7 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_Parallel/4_Shards-8 3898989 327.8 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_Parallel/8_Shards-8 5443684 241.1 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_Parallel/16_Shards-8 6995467 186.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_Parallel/32_Shards-8 8505585 154.6 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_Parallel/64_Shards-8 10256752 170.9 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_Parallel/128_Shards-8 12003910 113.5 ns/op 23 B/op 1 allocs/op
BenchmarkCache_Get_MaxEntriesLimit_EvictionPolicyLRU_Parallel-8 1995304 627.3 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU_Parallel/2_Shards-8 2628376 474.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU_Parallel/4_Shards-8 3056476 407.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU_Parallel/8_Shards-8 4281996 304.3 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU_Parallel/16_Shards-8 5438091 237.2 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU_Parallel/32_Shards-8 6442630 209.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU_Parallel/64_Shards-8 8096386 177.4 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLRU_Parallel/128_Shards-8 9417211 137.3 ns/op 23 B/op 1 allocs/op
BenchmarkCache_Get_MaxEntriesLimit_EvictionPolicyLFU_Parallel-8 1463374 796.4 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU_Parallel/2_Shards-8 2112945 591.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU_Parallel/4_Shards-8 3008568 412.4 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU_Parallel/8_Shards-8 4302746 296.3 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU_Parallel/16_Shards-8 5671981 231.8 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU_Parallel/32_Shards-8 6828380 186.5 ns/op 23 B/op 2 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU_Parallel/64_Shards-8 7074661 161.5 ns/op 23 B/op 2 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyLFU_Parallel/128_Shards-8 9294237 139.2 ns/op 23 B/op 2 allocs/op
BenchmarkCache_Get_MaxEntriesLimit_EvictionPolicyRandom_Parallel-8 1838180 675.1 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom_Parallel/2_Shards-8 2781007 455.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom_Parallel/4_Shards-8 4072056 341.4 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom_Parallel/8_Shards-8 5529966 227.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom_Parallel/16_Shards-8 7354364 211.7 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom_Parallel/32_Shards-8 8624466 138.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom_Parallel/64_Shards-8 11442829 161.4 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Get_MaxEntriesLimit_EvictionPolicyRandom_Parallel/128_Shards-8 12071902 104.4 ns/op 23 B/op 1 allocs/op
BenchmarkCache_Peek_Parallel-8 7957777 155.1 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek_Parallel/2_Shards-8 7781154 163.5 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek_Parallel/4_Shards-8 12301404 112.0 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek_Parallel/8_Shards-8 12828216 106.2 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek_Parallel/16_Shards-8 13837890 94.11 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek_Parallel/32_Shards-8 14921073 89.67 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek_Parallel/64_Shards-8 15708536 87.81 ns/op 23 B/op 1 allocs/op
BenchmarkSharded_Peek_Parallel/128_Shards-8 16547871 84.76 ns/op 23 B/op 1 allocs/op
BenchmarkMap_Get_Parallel-8 3098846 453.0 ns/op 23 B/op 1 allocs/op
PASS
ok github.com/erni27/imcache 366.377s
Writes
go version
go version go1.21.6 darwin/arm64
go test -benchmem -bench "_Set"
goos: darwin
goarch: arm64
pkg: github.com/erni27/imcache
BenchmarkCache_Set-8 2942062 461.7 ns/op 161 B/op 2 allocs/op
BenchmarkSharded_Set/2_Shards-8 2939275 487.5 ns/op 162 B/op 2 allocs/op
BenchmarkSharded_Set/4_Shards-8 2827146 497.1 ns/op 166 B/op 2 allocs/op
BenchmarkSharded_Set/8_Shards-8 2837316 509.1 ns/op 165 B/op 2 allocs/op
BenchmarkSharded_Set/16_Shards-8 2818513 495.7 ns/op 166 B/op 2 allocs/op
BenchmarkSharded_Set/32_Shards-8 2793490 506.3 ns/op 167 B/op 2 allocs/op
BenchmarkSharded_Set/64_Shards-8 2815544 499.7 ns/op 166 B/op 2 allocs/op
BenchmarkSharded_Set/128_Shards-8 2738779 511.2 ns/op 170 B/op 2 allocs/op
BenchmarkCache_Set_MaxEntriesLimit_EvictionPolicyLRU-8 3217950 423.2 ns/op 65 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU/2_Shards-8 2893335 458.4 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU/4_Shards-8 2940762 460.9 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU/8_Shards-8 2976267 462.5 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU/16_Shards-8 2849967 478.1 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU/32_Shards-8 2859116 472.2 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU/64_Shards-8 2842370 466.6 ns/op 68 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU/128_Shards-8 2863222 481.6 ns/op 68 B/op 2 allocs/op
BenchmarkCache_Set_MaxEntriesLimit_EvictionPolicyLFU-8 3198320 417.6 ns/op 65 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU/2_Shards-8 2944507 450.2 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU/4_Shards-8 2915707 456.9 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU/8_Shards-8 2820458 464.4 ns/op 68 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU/16_Shards-8 2833208 479.6 ns/op 68 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU/32_Shards-8 2864629 460.9 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU/64_Shards-8 2846596 491.7 ns/op 68 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU/128_Shards-8 2841228 493.6 ns/op 68 B/op 2 allocs/op
BenchmarkCache_Set_MaxEntriesLimit_EvictionPolicyRandom-8 2988330 459.8 ns/op 59 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom/2_Shards-8 2713388 495.6 ns/op 57 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom/4_Shards-8 2756364 493.7 ns/op 58 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom/8_Shards-8 2691565 484.5 ns/op 57 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom/16_Shards-8 2710840 479.6 ns/op 57 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom/32_Shards-8 2728695 496.0 ns/op 57 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom/64_Shards-8 2690887 507.6 ns/op 57 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom/128_Shards-8 2663871 495.1 ns/op 57 B/op 2 allocs/op
BenchmarkMap_Set-8 5847526 339.0 ns/op 106 B/op 2 allocs/op
BenchmarkCache_Set_Parallel-8 2347249 527.7 ns/op 123 B/op 2 allocs/op
BenchmarkSharded_Set_Parallel/2_Shards-8 3112208 444.3 ns/op 156 B/op 2 allocs/op
BenchmarkSharded_Set_Parallel/4_Shards-8 3323001 401.2 ns/op 149 B/op 2 allocs/op
BenchmarkSharded_Set_Parallel/8_Shards-8 4130948 291.3 ns/op 131 B/op 2 allocs/op
BenchmarkSharded_Set_Parallel/16_Shards-8 5516203 274.4 ns/op 169 B/op 2 allocs/op
BenchmarkSharded_Set_Parallel/32_Shards-8 6069385 219.0 ns/op 158 B/op 2 allocs/op
BenchmarkSharded_Set_Parallel/64_Shards-8 7290878 187.9 ns/op 141 B/op 2 allocs/op
BenchmarkSharded_Set_Parallel/128_Shards-8 8021259 163.6 ns/op 133 B/op 2 allocs/op
BenchmarkCache_Set_MaxEntriesLimit_EvictionPolicyLRU_Parallel-8 2402929 555.8 ns/op 66 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU_Parallel/2_Shards-8 2835458 418.2 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU_Parallel/4_Shards-8 3219746 393.8 ns/op 65 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU_Parallel/8_Shards-8 4225972 301.9 ns/op 65 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU_Parallel/16_Shards-8 5186444 246.7 ns/op 67 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU_Parallel/32_Shards-8 6100933 222.6 ns/op 70 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU_Parallel/64_Shards-8 7518198 180.7 ns/op 65 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLRU_Parallel/128_Shards-8 8257630 180.1 ns/op 65 B/op 2 allocs/op
BenchmarkCache_Set_MaxEntriesLimit_EvictionPolicyLFU_Parallel-8 2344273 543.1 ns/op 66 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU_Parallel/2_Shards-8 2973801 442.6 ns/op 69 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU_Parallel/4_Shards-8 3416180 383.2 ns/op 65 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU_Parallel/8_Shards-8 4511509 293.7 ns/op 65 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU_Parallel/16_Shards-8 5374215 230.7 ns/op 68 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU_Parallel/32_Shards-8 6602998 205.1 ns/op 65 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU_Parallel/64_Shards-8 7730086 171.8 ns/op 65 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyLFU_Parallel/128_Shards-8 8232051 154.6 ns/op 65 B/op 2 allocs/op
BenchmarkCache_Set_MaxEntriesLimit_EvictionPolicyRandom_Parallel-8 2186001 592.0 ns/op 55 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom_Parallel/2_Shards-8 2716564 438.3 ns/op 57 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom_Parallel/4_Shards-8 3548733 366.0 ns/op 55 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom_Parallel/8_Shards-8 4665452 296.7 ns/op 55 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom_Parallel/16_Shards-8 6088111 240.0 ns/op 59 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom_Parallel/32_Shards-8 7442355 197.1 ns/op 55 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom_Parallel/64_Shards-8 8089219 163.0 ns/op 55 B/op 2 allocs/op
BenchmarkSharded_Set_MaxEntriesLimit_EvictionPolicyRandom_Parallel/128_Shards-8 9815180 144.8 ns/op 56 B/op 2 allocs/op
BenchmarkMap_Set_Parallel-8 3541270 407.3 ns/op 92 B/op 2 allocs/op
PASS
ok github.com/erni27/imcache 135.166s