From 9a0ae07dfe5cae44eb013ff2fba1443f0817d3f7 Mon Sep 17 00:00:00 2001
From: Jan-Lukas Else <mail@jlelse.de>
Date: Sun, 29 Mar 2020 18:36:44 +0200
Subject: [PATCH] Reduce response time by using goroutine to update hit counter

---
 main.go | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/main.go b/main.go
index 31d222f..c4c1789 100644
--- a/main.go
+++ b/main.go
@@ -218,16 +218,13 @@ func ShortenedUrlHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	stmt, err := db.Prepare("UPDATE redirect SET hits = hits + 1 WHERE slug = ?")
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-		return
-	}
-	_, err = stmt.Exec(slug)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-		return
-	}
+	go func() {
+		stmt, err := db.Prepare("UPDATE redirect SET hits = hits + 1 WHERE slug = ?")
+		if err != nil {
+			return
+		}
+		_, _ = stmt.Exec(slug)
+	}()
 
 	http.Redirect(w, r, redirectUrl, http.StatusTemporaryRedirect)
 }