add basic benchmark for most processors

internal/processor/test/string-decode_test.go

@@ -1,6 +1,7 @@
 package processor_test
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/jwetzell/showbridge-go/internal/common"
@@ -98,3 +99,27 @@ func TestBadStringDecode(t *testing.T) {
 		})
 	}
 }
+
+func BenchmarkStringDecode(b *testing.B) {
+	registration, ok := processor.ProcessorRegistry["string.decode"]
+	if !ok {
+		b.Fatalf("string.decode processor not registered")
+	}
+
+	processorInstance, err := registration.New(config.ProcessorConfig{
+		Type: "string.decode",
+	})
+
+	if err != nil {
+		b.Fatalf("string.decode failed to create processor: %s", err)
+	}
+
+	count := 0
+	for b.Loop() {
+		_, err := processorInstance.Process(b.Context(), common.WrappedPayload{Payload: []byte(fmt.Sprintf("%d", count))})
+		if err != nil {
+			b.Fatalf("string.decode processing failed: %s", err)
+		}
+		count++
+	}
+}