You have changed the code snippets in your link. The original link highlighted this snippet: Future<void> insertEmbedding(EmbeddingProto embedding) async {

You have changed the code snippets in your link. The original link highlighted this snippet: Future<void> insertEmbedding(EmbeddingProto embedding) async { final db = await _database; await db.writeTransaction((tx) async { await tx.execute('INSERT INTO $tableName ($columnEmbedding) values(?)', [embedding.writeToBuffer()]); }); } Now highlighted: Future<void> insertMultipleEmbeddings(List<EmbeddingProto> embeddings) async { final db = await _database; final inputs = embeddings.map((e) => [e.writeToBuffer()]).toList(); await db.executeBatch( 'INSERT INTO $tableName ($columnEmbedding) values(?)', inputs); } Did you post the wrong link the first time and corrected your mistake? Or did you change the snippet because @electroly was right about the code being inefficient?