Google quantum-proofs HTTPS by squeezing 2.5kB of data into 64-byte space

· · 来源:tutorial资讯

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Heat sensors, often installed in kitchens to avoid false alarms if you simply happen to burn the toast, generally sound when temperatures climb above roughly 50C.

十万级电车聪明了不少|记者过年

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「防窥膜」就是很多人的刚需,即使贴防窥膜会影响屏幕显示效果,他们也依然会选择贴上去。

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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.