Amazon S3 Glacier Flexible Retrieval improves data restore time by up to 85%, at no additional cost. Faster data restores automatically apply to the Standard retrieval tier when using Amazon S3 Batch Operations. These restores begin to return objects within minutes, so you can process restored data faster. Now, whether you are transcoding media, restoring operational backups, training machine learning models, or analyzing historical data, you can easily speed up your data restores from archive.
Source:: Amazon AWS