Fix slow taps in a large game navigation menu
The practical problem
A game menu may appear fully loaded but remain sluggish while scripts sort hundreds of cards. INP distinguishes event input delay, callback processing and presentation delay.
Implementation protocol
Trace a representative tap in the browser performance panel, then remove synchronous sort work from the hot path. Filter an indexed list and update only changed cards; break optional work into smaller tasks.
Worked scenario
If sorting requires 80 milliseconds and layout another 70 milliseconds, optimizing only event listener attachment does not address most of the interaction time. Report the separate phases.
What could go wrong
A full-second debounce may hide computation but feels broken.
Acceptance criteria
Test rapid tap sequences on slow phones, preserving immediate confirmation and keyboard navigation.
Source material and evidence boundaries
For the topic Fix slow taps in a large game navigation menu, use the sources listed below to check relevant methods. Any worked figures illustrate a scenario, not measured MojPlayWin performance. Consult the shared evidence standards before applying the method.