♻️ Refactor: replace isInCharset with bytes.IndexByte (#3342)

Author: ksw2000

ctx.go

@@ -1349,7 +1349,7 @@ func (c *DefaultCtx) getLocationFromRoute(route Route, params Map) (string, erro
 
 		for key, val := range params {
 			isSame := key == segment.ParamName || (!c.app.config.CaseSensitive && utils.EqualFold(key, segment.ParamName))
-			isGreedy := segment.IsGreedy && len(key) == 1 && isInCharset(key[0], greedyParameters)
+			isGreedy := segment.IsGreedy && len(key) == 1 && bytes.IndexByte(greedyParameters, key[0]) != -1
 			if isSame || isGreedy {
 				_, err := buf.WriteString(utils.ToString(val))
 				if err != nil {

path.go

@@ -7,6 +7,7 @@
 package fiber
 
 import (
+	"bytes"
 	"regexp"
 	"strconv"
 	"strings"
@@ -308,7 +309,7 @@ func (routeParser *routeParser) analyseParameterPart(pattern string, customConst
 		parameterEndPosition = 0
 	case parameterEndPosition == -1:
 		parameterEndPosition = len(pattern) - 1
-	case !isInCharset(pattern[parameterEndPosition+1], parameterDelimiterChars):
+	case bytes.IndexByte(parameterDelimiterChars, pattern[parameterEndPosition+1]) == -1:
 		parameterEndPosition++
 	}
 
@@ -397,16 +398,6 @@ func (routeParser *routeParser) analyseParameterPart(pattern string, customConst
 	return n, segment
 }
 
-// isInCharset check is the given character in the charset list
-func isInCharset(searchChar byte, charset []byte) bool {
-	for _, char := range charset {
-		if char == searchChar {
-			return true
-		}
-	}
-	return false
-}
-
 // findNextCharsetPosition search the next char position from the charset
 func findNextCharsetPosition(search string, charset []byte) int {
 	nextPosition := -1