# Document revisions
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| Change | Description | Date | 
| --- |--- |--- |
| [Minor best practice update](#document-revisions) | PERF03-BP04 was updated with new service recommendations. | November 6, 2024 | 
| [Updated best practice guidance](#document-revisions) | Multiple small updates throughout the pillar. | June 27, 2024 | 
| [Major update and restructure](#document-revisions) | Pillar restructured to have five best practice areas (down from eight). Content has been consolidated into the five areas and updated. New best practice areas are [Architecture selection](https://docs.aws.amazon.com/wellarchitected/latest/performance-efficiency-pillar/architecture-selection.html), [Compute and hardware](https://docs.aws.amazon.com/wellarchitected/latest/performance-efficiency-pillar/compute-and-hardware.html), [Data management](https://docs.aws.amazon.com/wellarchitected/latest/performance-efficiency-pillar/data-management.html), [Networking and content delivery](https://docs.aws.amazon.com/wellarchitected/latest/performance-efficiency-pillar/networking-and-content-delivery.html), and [Process and culture](https://docs.aws.amazon.com/wellarchitected/latest/performance-efficiency-pillar/process-and-culture.html).  | October 3, 2023 | 
| [Minor update](#document-revisions) | Remove non-inclusive language. | April 13, 2023 | 
| [Updates for new Framework](#document-revisions) | Best practices updated with prescriptive guidance and new best practices added. | April 10, 2023 | 
| [Whitepaper updated](#document-revisions) | Best practices updated with new implementation guidance. | December 15, 2022 | 
| [Whitepaper updated](#document-revisions) | Best practices expanded and improvement plans added. | October 20, 2022 | 
| [Minor update](#document-revisions) | Removed non-inclusive language. | April 22, 2022 | 
| [Minor updates](#document-revisions) | Updated links. | March 10, 2021 | 
| [Minor updates](#document-revisions) | Changed AWS Lambda timeout to 900 seconds and corrected name of Amazon Keyspaces (for Apache Cassandra). | October 5, 2020 | 
| [Minor update](#document-revisions) | Fixed broken link. | July 15, 2020 | 
| [Updates for new Framework](#document-revisions) | Major review and update of content | July 8, 2020 | 
| [Whitepaper updated](#document-revisions) | Minor update for grammatical issues | July 1, 2018 | 
| [Whitepaper updated](#document-revisions) | Refreshed the whitepaper to reflect changes in AWS | November 1, 2017 | 
| [Initial publication](#document-revisions) | Performance Efficiency Pillar - AWS Well-Architected Framework published. | November 1, 2016 |