diff --git a/README.md b/README.md
new file mode 100644
index 0000000..86f7370
--- /dev/null
+++ b/README.md
@@ -0,0 +1,44 @@
+go-sieve
+====================
+
+Sieve email filtering language ([RFC 5228][rfc5228])
+implementation in Go.
+
+## Extensions
+
+- envelope (RFC 5228)
+- fileinto (RFC 5228)
+
+## Example
+
+```go
+package main
+
+import (
+	"context"
+	"strings"
+
+	"github.com/foxcpp/go-sieve"
+	"github.com/foxcpp/go-sieve/interp"
+)
+
+func main() {
+	const script = `
+require "fileinto";
+if header :contains "subject" "rich" {
+    fileinto "Junk";
+}
+`
+
+	parsed, _ := sieve.Load(strings.NewReader(script), sieve.DefaultOptions())
+	data := interp.NewRuntimeData(
+		parsed,
+		interp.Callback{},
+	)
+	parsed.Execute(context.Background(), data)
+	// inspect RuntimeData for results
+}
+
+```
+
+[rfc5228]: https://datatracker.ietf.org/doc/html/rfc5228
\ No newline at end of file
diff --git a/cmd/sieve-run/main.go b/cmd/sieve-run/main.go
index 9c4fded..c3f68fa 100644
--- a/cmd/sieve-run/main.go
+++ b/cmd/sieve-run/main.go
@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"context"
 	"flag"
+	"fmt"
 	"log"
 	"net/textproto"
 	"os"
@@ -65,11 +66,14 @@ func main() {
 	data.SMTP.To = *envTo
 
 	ctx := context.Background()
+	start = time.Now()
 	if err := loadedScript.Execute(ctx, data); err != nil {
 		log.Fatalln(err)
 	}
+	end = time.Now()
+	log.Println("script executed in", end.Sub(start))
 
-	log.Println("redirect:", data.RedirectAddr)
-	log.Println("fileinfo:", data.Mailboxes)
-	log.Println("keep:", data.ImplicitKeep || data.Keep)
+	fmt.Println("redirect:", data.RedirectAddr)
+	fmt.Println("fileinfo:", data.Mailboxes)
+	fmt.Println("keep:", data.ImplicitKeep || data.Keep)
 }