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.
HH x C++ Fast RoutingTraditional Routing A*2-phaseCalculation time: 13 secCalculation time: 36 sec
。业内人士推荐51吃瓜作为进阶阅读
NYT Strands hint for today’s theme: It's a little muchThe words are related to extras.
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海星游艇的突破性意义，不只是卖出几艘船，而是在高端制造领域建立“品牌溢价”的可能性，这恰恰是中国制造长期最稀缺的能力。。雷电模拟器官方版本下载对此有专业解读
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