Once again processing 11 million rows, now in seconds

A PHP developer optimizes a script processing 11 million database events, improving performance from 50k to 1.7M events per second through incremental changes. Key optimizations include combining SQL inserts, moving calculations from MySQL to PHP, eliminating object instantiation in favor of raw arrays, and removing JSON deserialization by using direct database columns. The journey demonstrates the trade-offs between code convenience and raw performance, with the final implementation processing data in seconds rather than days.