func main() {
debug.SetGCPercent(10)
fmt.Println("Number of entries: ", entries)
config := bigcache.Config{
Shards: 256,
LifeWindow: 100 * time.Minute,
MaxEntriesInWindow: entries,
MaxEntrySize: 200,
Verbose: true,
}
bigcache, _ := bigcache.NewBigCache(config)
for i := 0; i < entries; i++ {
key, val := generateKeyValue(i, valueSize)
bigcache.Set(key, val)
}
firstKey, _ := generateKeyValue(1, valueSize)
checkFirstElement(bigcache.Get(firstKey))
fmt.Println("GC pause for bigcache: ", gcPause())
bigcache = nil
gcPause()
//------------------------------------------
freeCache := freecache.NewCache(entries * 200) //allocate entries * 200 bytes
for i := 0; i < entries; i++ {
key, val := generateKeyValue(i, valueSize)
if err := freeCache.Set([]byte(key), val, 0); err != nil {
fmt.Println("Error in set: ", err.Error())
}
}
firstKey, _ = generateKeyValue(1, valueSize)
checkFirstElement(freeCache.Get([]byte(firstKey)))
if freeCache.OverwriteCount() != 0 {
fmt.Println("Overwritten: ", freeCache.OverwriteCount())
}
fmt.Println("GC pause for freecache: ", gcPause())
freeCache = nil
gcPause()
//------------------------------------------
mapCache := make(map[string][]byte)
for i := 0; i < entries; i++ {
key, val := generateKeyValue(i, valueSize)
mapCache[key] = val
}
fmt.Println("GC pause for map: ", gcPause())
}
func initBigCache(entriesInWindow int) *bigcache.BigCache {
cache, _ := bigcache.NewBigCache(bigcache.Config{
Shards: 256,
LifeWindow: 10 * time.Minute,
MaxEntriesInWindow: entriesInWindow,
MaxEntrySize: maxEntrySize,
Verbose: true,
})
return cache
}
func NewCacheHandler(handler http.Handler, cacheConfig CacheConfig) *CacheHandler {
bcConfig := bigcache.DefaultConfig(time.Hour)
bcConfig.HardMaxCacheSize = cacheConfig.MaxCacheSize
// use to calculate initial size
bcConfig.MaxEntrySize = 256 // bytes, should fit almost all responses
bcConfig.LifeWindow = 2000 // number of unique users seen in time.Hour
cache, err := bigcache.NewBigCache(bcConfig)
if err != nil {
log.WithFields(log.Fields{
"err": err.Error(),
}).Panic("Could not create Cache bigcache")
}
return &CacheHandler{
handler: handler,
cache: cache,
}
}