Memory optimization of lookup function

drogonframework · Oct 9, 2023 · 9e2e6f6 · 9e2e6f6
1 parent 2caef27
commit 9e2e6f6
Showing 1 changed file with 12 additions and 5 deletions.
diff --git a/lib/src/HostRedirector.cc b/lib/src/HostRedirector.cc
@@ -120,14 +120,21 @@ void HostRedirector::lookup(string& host, string& path) const
             if (!toHost.empty())
                 host = toHost;
 
-            string newPath = to->path;
             if (isWildcard)
             {
-                auto start = path.size() - lastWildcardPathViewLen;
-                newPath.append(path.substr(
-                    start + (newPath.back() == '/' && path[start] == '/')));
+                const string& toPath = to->path;
+                string newPath;
+                const auto len = path.size();
+                auto start = len - lastWildcardPathViewLen;
+                start += toPath.back() == '/' && path[start] == '/';
+                newPath.reserve(toPath.size() + (len - start));
+
+                newPath = toPath;
+                newPath.append(path.substr(start));
+                path = std::move(newPath);
             }
-            path = std::move(newPath);
+            else
+                path = to->path;
         }
         else
             break;