perf: Optimize code with minimal fields (#6)

* perf: Reduce struct field by using key in map

* perf: Optimize field using bool instead of int

analyzer.go

@@ -39,31 +39,29 @@ func run(pass *analysis.Pass) (any, error) {
 			return
 		}
 
-		var st *structType
-		st, ok = structs[recv.Name]
+		st, ok := structs[recv.Name]
 		if !ok {
-			structs[recv.Name] = &structType{recv: recv.Name}
+			structs[recv.Name] = &structType{}
 			st = structs[recv.Name]
 		}
 
 		if isStar {
-			st.numStarMethod++
+			st.starUsed = true
 		} else {
-			st.numTypeMethod++
+			st.typeUsed = true
 		}
 	})
 
-	for _, st := range structs {
-		if st.numStarMethod > 0 && st.numTypeMethod > 0 {
-			pass.Reportf(pass.Pkg.Scope().Lookup(st.recv).Pos(), "the methods of %q use pointer receiver and non-pointer receiver.", st.recv)
+	for recv, st := range structs {
+		if st.starUsed && st.typeUsed {
+			pass.Reportf(pass.Pkg.Scope().Lookup(recv).Pos(), "the methods of %q use pointer receiver and non-pointer receiver.", recv)
 		}
 	}
 
 	return nil, nil
 }
 
 type structType struct {
-	recv          string
-	numStarMethod int
-	numTypeMethod int
+	starUsed bool
+	typeUsed bool
 }