prefer-single-call

Combine consecutive Array.push or Array.unshift calls

Consecutive calls that append or prepend values to the same array repeat dispatch and capacity work.
Instead, you SHOULD pass all values to one push or unshift call.

Calls are combined only when the arguments cannot observe the intermediate array state.

- Category: performance
- Level: warning
- Fix: automatic
- Scope: module

Reported

function append(values: int32[]): void {
    values.push(1);
    values.push(2);
}
Accepted

function append(values: int32[]): void {
    values.push(1, 2);
}
Prior art

- eslint-plugin-unicorn · prefer-single-call

language/linter/src/rules/performance/prefersinglecall.rs:8