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.
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尽管这是一笔基于长期战略的资源锁定，但对于投资者而言，真金白银的流出与当期报表的承压，终究需要谨慎权衡。
首先对用户实用价值最高也是最具良心的升级点是将iPhone 17e的起步存储容量提升至了256GB，做到了与iPhone 17起步存储容量一致，并在此基础上保持了起售价不变，这种加量不加价在当下存储芯片价格暴涨，国产传言将集体涨价的现实下，显得尤为难得。