Some ergonomic keyboards come with permanent or removable wrist or palm rests, which can be cushioned or hard. This is another area where opinions diverge: proponents claim they help you maintain a neutral hand position, while detractors say they put pressure on the tendons and can cause wrist pain or even exacerbate conditions like carpal tunnel. Ideally, your palms should be resting, not your wrists, and you might find you like having that support or you may find the pressure uncomfortable.
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.
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但更深层的逻辑在于，他押注的或许并不仅是制造端升级，而是中国消费结构的再升级，押注一批中产家庭开始把“海上休闲”纳入生活方式版图。一旦生活方式被激活，产业才有规模；一旦规模形成，制造端的优势自然水到渠成。
“我是他们行程的‘总管家’，提供行前咨询、导游等服务。”左鹏说，他所在公司已有5名面向入境市场的旅游规划师；去年公司接待的1万多名入境散客中，约三成选择了他们的服务。