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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對於此次默茨訪華，麥永剛直接表示德國難有具體的成果：德企去風險化（derisking）的工作遠遠不足，卻需抵禦中國進口衝擊，不僅是汽車產業，德國的生物科技及化工產業情況都很險峻。他認為，有些長期在華德國人吸收了宣傳觀點，卻忽略西方經濟現實，成為「熊貓擁抱者」，其樂觀看法常誤導了在德國的總部。
Backpressure – the ability for a slow consumer to signal a fast producer to slow down – is a first-class concept in Web streams. In theory. In practice, the model has some serious flaws.，更多细节参见下载安装 谷歌浏览器 开启极速安全的 上网之旅。