computing: punched card machines that did not evaluate programs, but sorted and
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At the heart of BuildKit is LLB (Low-Level Build definition). Think of it as the LLVM IR of build systems. LLB is a binary protocol (protobuf) that describes a DAG of filesystem operations: run a command, copy files, mount a filesystem. It’s content-addressable, which means identical operations produce identical hashes, enabling aggressive caching.
YouTube平均拿走约 20% 的引用份额，在 Google AI Overviews 里更是29.5% 的结果会引用 YouTube，并且“被引用次数”大约是其它视频平台的 200 倍；对照组里，Vimeo、TikTok 这种平台的引用占比只有 0.1% 左右，Twitch、Dailymotion 甚至基本不出现。