Use string::compare to improve performance.

8 years ago · c6a8736171
parent 6de4c29e76
commit c6a8736171
1 changed files with 2 additions and 3 deletions
--- a/json11.cpp
+++ b/json11.cpp
@ -547,12 +547,11 @@ struct JsonParser {
    Json expect(const string &expected, Json res) {
        assert(i != 0);
        i--;
-        const string found = str.substr(i, expected.length());
-        if (expected == found) {
+        if (str.compare(i, expected.length(), expected) == 0) {
            i += expected.length();
            return res;
        } else {
-            return fail("parse error: expected " + expected + ", got " + found);
+            return fail("parse error: expected " + expected + ", got " + str.substr(i, expected.length()));
        }
    }