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This commit is contained in:
Aliaksandr Valialkin 2024-06-11 16:41:31 +02:00
parent 4776696418
commit 701f5c6d85
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GPG key ID: 52C003EE2BCDB9EB
1 changed files with 10 additions and 8 deletions
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18
lib/bytesutil/internstring.go
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@ -26,6 +26,7 @@ type internStringMap struct {
readonly atomic.Pointer[map[string]internStringMapEntry]
cleanupInterval uint64
nextCleanupTime atomic.Uint64
}
@ -35,13 +36,14 @@ type internStringMapEntry struct {
}
func newInternStringMap() *internStringMap {
ism := &internStringMap{
m := &internStringMap{
mutable: make(map[string]string),
}
readonly := make(map[string]internStringMapEntry)
ism.readonly.Store(&readonly)
ism.nextCleanupTime.Store(fasttime.UnixTimestamp() + 61)
return ism
m.readonly.Store(&readonly)
m.cleanupInterval = uint64(cacheExpireDuration.Seconds() / 3)
m.nextCleanupTime.Store(fasttime.UnixTimestamp() + m.cleanupInterval)
return m
}
func (m *internStringMap) getReadonly() map[string]internStringMapEntry {
@ -49,12 +51,12 @@ func (m *internStringMap) getReadonly() map[string]internStringMapEntry {
}
func (m *internStringMap) intern(s string) string {
if *disableCache || len(s) > *internStringMaxLen {
if isSkipCache(s) {
return strings.Clone(s)
}
currentTime := fasttime.UnixTimestamp()
if currentTime >= m.nextCleanupTime.Load() {
m.nextCleanupTime.Store(currentTime + 61)
m.nextCleanupTime.Store(currentTime + m.cleanupInterval)
m.cleanup()
}
@ -65,11 +67,11 @@ func (m *internStringMap) intern(s string) string {
return e.s
}
// Slower path - search for the string in mutable map
// Slower path - search for the string in mutable map under the lock.
m.mu.Lock()
sInterned, ok := m.mutable[s]
if !ok {
// Verify whether the s has been already registered by concurrent goroutines in m.readonly
// Verify whether s has been already registered by concurrent goroutines in m.readonly
readonly = m.getReadonly()
e, ok = readonly[s]
if !ok {