Rule Definition
Use find for Id->Child nested selectors. The .find() approach is faster because the first selection is handled without going through the Sizzle selector engine.
Remediation
Use find for Id->Child nested selectors.
Violation Code Sample
var $productIds = $("#products div.id"); // SLOW
Fixed Code Sample
var $productIds = $("#products").find("div.id"); // FAST
Reference
https://learn.jquery.com/performance/optimize-selectors/#id-based-selectors
Related Technologies
HTML5
Technical Criterion
CWE-1050 - Excessive Platform Resource Consumption within a Loop
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