Commit 1a9bbe6
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Ch011 H6: new 17k chars (str·regex 운영 5 함정 — encoding 5(UTF-8 BOM·CP949·EUC-KR·ISO-2022-KR·EUC-JP)+chardet/cchardet·regex catastrophic backtracking 5 위험+5 처방·str + str 100배 vs join+StringIO·메모리 sys.getsizeof+tracemalloc+5 도구·timeit 5 패턴·운영 5 패턴(patterns 모듈 레벨·encoding 명시·join·f-string·measure first)+우선순위 매일/매주/매월·자경단 5 시나리오+1주 통계 148 호출+5 anti-pattern·1년 ROI 100시간/5명 550시간 절약·오해20+FAQ20+추신102)
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