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.
但更痛的是口碑的持续滑坡和竞品带来的竞争，完美日记的产品以代工为主，研发投入占比极低，核心竞争力停留在包装、配色与营销概念，缺乏技术壁垒。当花西子、酵色、橘朵、彩棠等一大批国货彩妆品牌跟进内容种草+平替模式后，完美日记的差异化优势迅速消失。
。关于这个话题，搜狗输入法2026提供了深入分析
他们大多是社区里的退休居民，用无偿服务，既降低了医院的运营成本，也给老年患者带来了专属的温暖。
"Had I not have heard [the smoke alarm], I would have just been in there," says McConnell. "They are essential, absolutely essential."