AST clone on every cache hit. The SQL parse is cached, but the AST is .clone()‘d on every sqlite3_exec(), then recompiled to VDBE bytecode from scratch. SQLite’s sqlite3_prepare_v2() just returns a reusable handle.
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score candidate = character error + (optional) pixel drift penalty
国务院总理李强5日在政府工作报告中介绍，一年来，持续加强政府建设，创新和完善社会治理。