refactor: replace Split in loops with more efficient SplitSeq

api/apiutil/header.go

@@ -56,7 +56,7 @@ func ParseAccept(header string) []mediaRange {
 	}
 
 	var out []mediaRange
-	for _, field := range strings.Split(header, ",") {
+	for field := range strings.SplitSeq(header, ",") {
 		if r, ok := parseMediaRange(field); ok {
 			out = append(out, r)
 		}

changelog/asttool-use-splitseq.md

@@ -0,0 +1,3 @@
+### Fixed
+
+- replace Split in loops with more efficient SplitSeq

cmd/beacon-chain/flags/api_module.go

@@ -14,7 +14,7 @@ func EnableHTTPEthAPI(httpModules string) bool {
 }
 
 func enableAPI(httpModules, api string) bool {
-	for _, m := range strings.Split(httpModules, ",") {
+	for m := range strings.SplitSeq(httpModules, ",") {
 		if strings.EqualFold(m, api) {
 			return true
 		}

tools/nogo_config/main.go

@@ -68,7 +68,7 @@ func main() {
 		return
 	}
 
-	for _, check := range strings.Split(*checks, ",") {
+	for check := range strings.SplitSeq(*checks, ",") {
 		c.AddExclusion(strings.TrimSpace(check), e)
 	}