Save fakeip metadata immediately

experimental/clashapi/cachefile/fakeip.go

@@ -3,6 +3,7 @@ package cachefile
 import (
 	"net/netip"
 	"os"
+	"time"
 
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing/common/logger"
@@ -57,6 +58,15 @@ func (c *CacheFile) FakeIPSaveMetadata(metadata *adapter.FakeIPMetadata) error {
 	})
 }
 
+func (c *CacheFile) FakeIPSaveMetadataAsync(metadata *adapter.FakeIPMetadata) {
+	if timer := c.saveMetadataTimer; timer != nil {
+		timer.Stop()
+	}
+	c.saveMetadataTimer = time.AfterFunc(10*time.Second, func() {
+		_ = c.FakeIPSaveMetadata(metadata)
+	})
+}
+
 func (c *CacheFile) FakeIPStore(address netip.Addr, domain string) error {
 	return c.DB.Batch(func(tx *bbolt.Tx) error {
 		bucket, err := tx.CreateBucketIfNotExists(bucketFakeIP)