Technology of Business
Donald Trump tapped Emil Michael (at right) in December 2024 to become undersecretary of defense for research and engineering.WIN MCNAMEE—Getty Images
，这一点在im钱包官方下载中也有详细论述
Git packfiles use delta compression, storing only the diff when a 10MB file changes by one line, while the objects table stores each version in full. A file modified 100 times takes about 1GB in Postgres versus maybe 50MB in a packfile. Postgres does TOAST and compress large values, but that’s compressing individual objects in isolation, not delta-compressing across versions the way packfiles do, so the storage overhead is real. A delta-compression layer that periodically repacks objects within Postgres, or offloads large blobs to S3 the way LFS does, is a natural next step. For most repositories it still won’t matter since the median repo is small and disk is cheap, and GitHub’s Spokes system made a similar trade-off years ago, storing three full uncompressed copies of every repository across data centres because redundancy and operational simplicity beat storage efficiency even at hundreds of exabytes.
近段时间，广西柳州融安县举办多场招聘会，向求职者提供数千个就业岗位。图为2月25日，融安县招聘会现场，求职者在交流。