UserThe problem at hand revolves around understanding the necessity of specifying unique IDs for looped items in Svelte Kit. Specifically, the inquiry delves into the reasons behind this requirement, the performance implications of not adhering to it, and how Svelte Kit optimizes rendering processes when unique IDs are provided.If you give any example that to like a bench marks It would really help me..! :)
Example with Unique IDs
<script> let people = [ { name: 'yoshi', beltColour: 'black', age: 25, id: 1 }, { name: 'mario', beltColour: 'orange', age: 45, id: 2 }, { name: 'luigi', beltColour: 'brown', age: 35, id: 3 } ];</script><h1>Loops</h1>{#each people as p (p.id)}<h3>{p.name}</h3><p>beltColour: {p.beltColour}</p><p>age: {p.age}</p>{/each}Example without Unique IDs
<script> let people = [ { name: 'yoshi', beltColour: 'black', age: 25 }, { name: 'mario', beltColour: 'orange', age: 45 }, { name: 'luigi', beltColour: 'brown', age: 35 } ];</script><h1>Loops</h1>{#each people as p}<h3>{p.name}</h3><p>beltColour: {p.beltColour}</p><p>age: {p.age}</p>{/each}The first example includes unique IDs for each item in the loop, while the second example does not. Observing the difference in performance between the two scenarios, especially with a large dataset, can help understand the significance of providing unique IDs in Svelte Kit applications.
I needed a proper benchmark example if possible :)