[23기_안준석] 성능최적화 미션 제출합니다.#68
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fervovita wants to merge 7 commits into
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Jong0128
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May 25, 2026
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과제 정말 수고많으셨습니다!
앞으로 팀 프로젝트도 잘 부탁드립니다 👍
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| | 단계 | actual time | 한 loop당 fetch row | 핵심 동작 | | ||
| |:-----:|:-----------:|:-----------------------:|:----------------------------------------------------------------:| | ||
| | 초기 상황 | 154ms | 17,156 → filter → 6,078 | CAST 함수 때문에 풀로 가져온 뒤 후필터 | | ||
| | 1 단계 | 119ms | 17,156 → filter → 6,078 | CAST 비용은 사라졌지만 여전히 hall_id로만 끌어옴, start_at 후필터 | | ||
| | 2 단계 | 101ms | 6,078 | idx_screening_hall_start_at로 hall_id 등호 + start_at 범위까지 인덱스에서 처리 | |
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