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Comments (3)

jakearchibald avatar jakearchibald commented on September 27, 2024

Why is "no loops" a requirement?

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DAmrGharieb avatar DAmrGharieb commented on September 27, 2024

For loop take alot of time i think i miss something

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jakearchibald avatar jakearchibald commented on September 27, 2024

Nah, the type of loop is very rarely the performance problem, it's almost always what's inside the loop that causes performance issues.

// Let's say you had a database like this:
const db = await openDB('Articles', 1, {
  upgrade(db) {
    // Create a store of objects
    const store = db.createObjectStore('articles', {
      // The 'id' property of the object will be the key.
      keyPath: 'id',
    });
  },
});

// And you had an array of articles:
const articles = [
  // …articles…
];

// I'd add them all like this:
const tx = db.transaction('articles', 'readwrite');
await Promise.all(articles.map((article) => tx.store.add(article)));
await tx.done;

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