Compiling PHP DTOs: from reflection to 4.5M hydrations per second

Short summary

A deep technical article on compiling PHP DTOs to eliminate reflection overhead. The Simple Data Objects package generates a specialized closure per data class at first call, turning property hydration into inline array reads with no per-call dispatch. Combined with opcache persistence and PHP 8.4 lazy ghosts, the approach reaches 4.5M hydrations per second.

• •Generates specialized closures per DTO class, replacing interpreted hydration loops with compiled inline reads
• •Reflection and attribute reads happen once per class; generated code is opcache-persisted
• •Plain properties become direct array reads; casted properties delegate to a shared ValueCaster with metadata captured in use

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