fix(fs,signature): Eagerly initialize metadata stores

internal/bootstrap/bootstrap.go

@@ -142,6 +142,9 @@ func NewApp(cfg *config.Config, options ...Option) (*App, error) {
 	var engine *rules.Engine
 	var rs *config.RulesCompileResult
 
+	signature.InitStore()
+	fs.InitMetadataStore()
+
 	if cfg.Filters.Rules.Enabled && !cfg.ForwardMode && !cfg.IsCaptureSet() && !cfg.IsFilamentSet() {
 		engine = rules.NewEngine(psnap, cfg)
 		var err error

pkg/fs/file.go

@@ -155,6 +155,12 @@ func GetMetadataStore() *FileMetadataStore {
 	return metadataStore
 }
 
+func InitMetadataStore() {
+	onceMetadataStore.Do(func() {
+		metadataStore = newFileMetadataStore()
+	})
+}
+
 // FileMetadataStore contains metainfo of PE files derived
 // from file creation or DLL loading. Metadata store is
 // invalidated on various signals such as file overwriting

pkg/util/signature/signature.go

@@ -140,6 +140,13 @@ func GetSignatures() *Signatures {
 	return sigs
 }
 
+// InitStore eagerly initializes the signature store and its worker pool.
+func InitStore() {
+	once.Do(func() {
+		sigs = newSignatures()
+	})
+}
+
 func newSignatures() *Signatures {
 	sigs = &Signatures{
 		signatures: make(map[Key]*Signature, 512),