Avoid some unnecessary string destruction in bench

src/parser3.h

@@ -446,13 +446,25 @@ inline PRESERVE_NONE WeaselJsonStatus n_object3(Parser3 *self, char *buf,
     assert(!self->inKey);
     self->inKey = true;
     self->pop();
-    if (auto s = self->push({N_STRING, T_COLON, N_VALUE, N_OBJECT3})) {
+    if (auto s = skipWhitespace(buf, bufEnd)) {
+      if (auto s2 = self->push({N_STRING, T_COLON, N_VALUE, N_OBJECT3})) {
+        return s2;
+      }
+      return s;
+    }
+    if (*buf != '"') [[unlikely]] {
+      return WeaselJson_REJECT;
+    }
+    ++buf;
+    self->dataBegin = self->writeBuf = buf;
+    self->strDfa.reset();
+    if (auto s = self->push({N_STRING2, T_COLON, N_VALUE, N_OBJECT3})) {
       return s;
     }
     if (buf == bufEnd) {
       return WeaselJson_AGAIN;
     }
-    MUSTTAIL return n_string(self, buf, bufEnd);
+    MUSTTAIL return n_string2(self, buf, bufEnd);
   default:
     [[unlikely]] return WeaselJson_REJECT;
   }

src/test.cpp

@@ -270,9 +270,10 @@ TEST_CASE("bench3") {
   bench.batch(json.size());
   bench.unit("byte");
   auto *parser = WeaselJsonParser_create(1024, &c, nullptr, 0);
+  std::string copy;
   for (size_t stride = 128; stride <= json.size(); stride *= 2) {
     bench.run("parser3 (stride: " + std::to_string(stride) + ")", [&]() {
-      auto copy = json;
+      copy = json;
       WeaselJsonParser_reset(parser);
       for (size_t i = 0; i < copy.size(); i += stride) {
         if (WeaselJsonParser_parse(parser, copy.data() + i,
@@ -383,10 +384,11 @@ TEST_CASE("bench input types") {
       bench.doNotOptimizeAway(doc);
     });
 
+    std::string copy;
     {
       auto *parser = WeaselJsonParser_create(1024, &c, nullptr, 0);
       bench.run("parser3 " + name, [&]() {
-        auto copy = json;
+        copy = json;
         WeaselJsonParser_reset(parser);
         if (WeaselJsonParser_parse(parser, copy.data(), copy.size()) !=
             WeaselJson_AGAIN) {
@@ -401,7 +403,7 @@ TEST_CASE("bench input types") {
     {
       auto *parser = WeaselJsonParser_create(1024, &c, nullptr, WeaselJsonRaw);
       bench.run("parser3 (raw) " + name, [&]() {
-        auto copy = json;
+        copy = json;
         WeaselJsonParser_reset(parser);
         if (WeaselJsonParser_parse(parser, copy.data(), copy.size()) !=
             WeaselJson_AGAIN) {