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Database Query Hygiene for App ResponsivenessMany developers assume that slow applications are caused by weak hardware or poor network connections. In reality, the root cause is often inefficient database interaction. When your backend asks the database for too much data, or in a way that forces the system to search through millions of rows, the user interface freezes. This post breaks down three foundational concepts: indexes, query shape, and payload trimming. By mastering these, you can significantly improve the perceived speed of your application without expensive infrastructure upgrades.Why indexes are the first line of defense for speedThink of a database...