manual-extend

Prefer extend over loops that insert every iterated value

A loop that only inserts each source value repeats the collection's bulk extension operation.
Instead, you SHOULD call extend with the source iterable.

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

Reported

function append(target: int32[], source: int32[]): void {
    for (const value of source) {
        target.push(value);
    }
}
Accepted

function append(target: int32[], source: int32[]): void {
    target.extend(source);
}
language/linter/src/rules/performance/manualextend.rs:8