eslint/no-await-in-loop Perf ​
What it does ​
This rule disallows the use of await within loop bodies. (for, for-in, for-of, while, do-while).
Why is this bad? ​
It potentially indicates that the async operations are not being effectively parallelized. Instead, they are being run in series, which can lead to poorer performance.
Example ​
Examples of incorrect code for this rule:
javascript
async function bad() {
for (const user of users) {
const userRecord = await getUserRecord(user);
}
}Examples of correct code for this rule:
javascript
async function good() {
await Promise.all(users.map((user) => getUserRecord(user)));
}