fixup! util: improve textencoder encodeInto performance

Author: anonrig

src/encoding_binding.cc

@@ -203,15 +203,23 @@ void BindingData::EncodeInto(const FunctionCallbackInfo<Value>& args) {
   if (view.is_one_byte()) {
     auto data = reinterpret_cast<const char*>(view.data8());
     simdutf::result result = simdutf::validate_ascii_with_errors(data, length);
-    // Only copy what fits in the destination
-    written = read = std::min(result.count, dest_length);
-    if (read > 0) {
-      memcpy(write_result, data, read);
-      write_result += read;
-      data += read;
-      length -= read;
-      dest_length -= read;
+    written = read = result.count;
+
+    // Check if ASCII portion exceeds destination size
+    if (result.count > dest_length) {
+      written = read = dest_length;
+      memcpy(write_result, data, dest_length);
+      binding_data->encode_into_results_buffer_[0] = static_cast<double>(read);
+      binding_data->encode_into_results_buffer_[1] =
+          static_cast<double>(written);
+      return;
     }
+
+    memcpy(write_result, data, read);
+    write_result += read;
+    data += read;
+    length -= read;
+    dest_length -= read;
     if (length != 0 && dest_length != 0) {
       size_t rest = findBestFit(data, length, dest_length);
       if (rest != 0) {