ef="#what-should-i-know-in-advance-when-attempting-a-performance-related-contribution?">What should I know in advance when attempting a performance related contribution?</a></h2>
<p>You should be trying to reduce the number of DOM operations or reduce algorithmic complexity in a hot spot. Anything else is likely a waste of time. Specifically, micro-optimizations like caching array lengths, caching object property values and inlining functions won&#39;t have any positive impact in modern javascript engines.<