avoid-slow-collection-methods
Warns when an invocation is a slow sync*
invocation.
Using sync*
invocations can result in a ~2 times slower code compared to other approaches.
Additionally, this rule highlights .expand()
usages as replacing them with a spread gives ~3 times performance difference.
Example
❌ Bad:
void fn() {
const iterable = [null, 2, 3, 4, 5, 6, 7, 8, 9];
iterable.whereNotNull(); // LINT: Avoid calling slow sync* methods. Try using a different method instead.
}
✅ Good:
void fn() {
const iterable = [null, 2, 3, 4, 5, 6, 7, 8, 9];
iterable.whereType<int>(); // Correct, not a 'sync*' method
}