update: performace ready#18

Merged

Charliechen114514 merged 12 commits into

mainfrom

feat/performance

Jun 28, 2026

Commits on Jun 28, 2026

docs(structure): add structure/craft standard
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refactor(structure): clear banned-patterns and consolidate helpers
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test(structure): add banned-pattern and layering gates
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perf(bench): add google-benchmark harness and sort baseline
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perf(sed): precompile substitute regex once per command (~4x faster)
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perf(md5sum): stream hashing in 64K chunks (O(1) memory vs 2x file)
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perf(cmp): stream both files in lockstep, early-exit at first diff
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perf(tar): stream archive creation instead of buffering whole archive
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perf(io): block-read for_each_line with memchr (~7x faster line reader)
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perf(bench): add end-to-end cfbox-vs-coreutils timing script
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fix(args): use strtol in parse_int to drop heavy <charconv> (CI cross-compile OOM)
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fix(tar): cast file_size modulo to size_t (armhf 32-bit -Wconversion)
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