diff --git a/functions/utils/valid.js b/functions/utils/valid.js
index 1969969f2..745872e45 100644
--- a/functions/utils/valid.js
+++ b/functions/utils/valid.js
@@ -1,3 +1,7 @@
+const wsRegex = generateREForProtocol("^(wss?:\\/\\/)?")
+const sseRegex = generateREForProtocol("^(https?:\\/\\/)?")
+const socketioRegex = generateREForProtocol("^((wss?:\\/\\/)|(https?:\\/\\/))?")
+
 function generateREForProtocol(protocol) {
   return new RegExp(
     `${protocol}[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6}\\b([-a-zA-Z0-9()@:%_\\+.~#?&\\/\\/=]*)`
@@ -8,22 +12,19 @@ function generateREForProtocol(protocol) {
  * valid url for ws/wss
  */
 export function wsValid(url) {
-  const protocol = "^(wss?:\\/\\/)?"
-  return generateREForProtocol(protocol).test(url)
+  return wsRegex.test(url)
 }
 
 /**
  * valid url for http/https
  */
 export function sseValid(url) {
-  const protocol = "^(https?:\\/\\/)?"
-  return generateREForProtocol(protocol).test(url)
+  return sseRegex.test(url)
 }
 
 /**
  * valid url for ws/wss/http/https
  */
 export function socketioValid(url) {
-  const protocol = "^((wss?:\\/\\/)|(https?:\\/\\/))?"
-  return generateREForProtocol(protocol).test(url)
+  return socketioRegex.test(url)
 }