Here is a neutral and objective summary of the text in one paragraph: The comparison between TimescaleDB and Amazon Timestream reveals significant differences in performance, cost, and features. TimescaleDB outperformed Amazon Timestream by 6000x on inserts and 5-175x on queries, depending on the query type, with Amazon Timestream's insert performance being dramatically slower due to its batch size limit. The cost difference was also striking, with fully-managed TimescaleDB being 154x cheaper than Amazon Timestream. Additionally, TimescaleDB offered more features and a more comprehensive ecosystem, including support for normalized datasets, JOINs across tables, and a wider range of tools and extensions. However, Amazon Timestream's narrow table model and lack of support for certain SQL features made it less suitable for complex queries. Overall, the comparison highlights the strengths and weaknesses of each database system and provides insights into their suitability for different use cases.