# Performance and Cost
+ TiDB is comprised of decoupled components that support horizontal scalability 
+ Improve performance and reduce the cost at the same time by customer case studies
  + `istyle` - migrate from SQL Server to TiDB Cloud Dedicated Tier to reduce the cost by half
  + `Catalyst` - scale the computing and storage layers independently
  + `Bolt` - database becomes highly compressed and much easier to operate
  + `KNN3` and `CTW` - consolidated multiple databases into a single TiDB Dedicated
Tier   + `Capcom` - the only RDBMS meets the flexible performance scaling requirements
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Performance is often the key motivation behind database migrations. However, deploying your database on TiDB Dedicated can be beneficial even if your applications don't have performance issues. For example, TiDB Dedicated scalability features can greatly reduce the amount of engineering effort required to prepare your database platform for future traffic growth.

In addition to improved performance, migrating to a new database platform should ideally result in reduced total cost of ownership while also providing your applications with comparable or enhanced features.

If you are running an open-source database engine (MySQL, Postgres), your costs are largely related to hardware, server management, and database management activities. However, if you are running a commercial database engine (Oracle, Microsoft SQL Server, Db2 and so on), a significant portion of your cost is database licensing.

TiDB Dedicated can even be more cost-efficient than license-free databases because its high scalability helps you control the number of component instances that are required to handle the workload on-demand.

Public performance-to-cost ratio case studies:
- `istyle` - https://www.pingcap.com/case-study/istyle-tidb-cloud-for-scalable-growth/
- `Catalyst` - https://www.pingcap.com/case-study/catalyst-chooses-tidb-to-power-its-customer-success-platform/
- `Bolt` - https://www.pingcap.com/case-study/bolt-amplifies-scalability-and-resiliency-of-its-storage-system-with-an-htap-database/
- `KNN3` - https://www.pingcap.com/case-study/fueling-the-web3-pioneer-with-a-simplified-scale-out-htap-solution/
- `CTW` - https://www.pingcap.com/case-study/boost-in-game-advertising-with-a-fully-managed-htap-database-service/
- `Capcom` - https://www.pingcap.com/case-study/why-capcom-chose-tidb-cloud-as-its-scalable-managed-database-for-online-game/