I'm not a antivirus programmer, but I think the scan engine scans through a file searching for known pattern inside. The greater number of patterns it can identify, the longer it will take to scan.
Optimization maybe similar to database optimization, with patterns indexing.
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我不是防病毒程序员，但我认为扫描引擎会扫描文件以搜索内部已知模式。它可以识别的模式越多，扫描所需的时间就越长。
优化可能类似于数据库优化，具有模式索引。
识别方法
I'm not a antivirus programmer, but I think the scan engine scans through a file searching for known pattern inside. The greater number of patterns it can identify, the longer it will take to scan.
Optimization maybe similar to database optimization, with patterns indexing.
Identification Methods