But when her mission finally took to the skies in 2005, the nightmare scenario happened again. A chunk of foam broke away during launch.
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.
，这一点在91视频中也有详细论述
100多年来，践行初心、担当使命，伟大建党精神融入党的精神血脉，贯穿党的奋斗历程，滋养着、激励着一代代共产党人。
也许是这种断断续续的往来，最后促成了那通年夜饭的电话。对方或许只是觉得该凑一凑，但在阿爸那里，这是一个迟了多年的邀请。