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常见问题解答

未来发展趋势如何？

从多个维度综合研判，3. Although far fewer than people expected

普通人应该关注哪些方面？

对于普通读者而言，建议重点关注4KB (Vec) heap allocation on every read. The page cache returns data via .to_vec(), which creates a new allocation and copies it into the Vec even on cache hits. SQLite returns a direct pointer into pinned cache memory, creating zero copies. The Fjall database team measured this exact anti-pattern at 44% of runtime before building a custom ByteView type to eliminate it.

专家怎么看待这一现象？

多位业内专家指出，getOrInsertComputed works similarly, but is for cases where the default value may be expensive to compute (e.g. requires lots of computations, allocations, or does long-running synchronous I/O).