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Dart2JS sdk/bin/dart2js_developer sieve.dart --enable-experiment=variance --experiment-new-rti --omit-implicit-checks --out=soundsplay.js --lax-runtime-type-to-string CollectionSieves-SplayTreeSet-removeLoop(RunTime): 4307.52688172043 us. CollectionSieves-SoundSplayTreeSet-removeLoop(RunTime): 4344.902386117137 us. sdk/bin/dart2js_developer sieve.dart --enable-experiment=variance --experiment-new-rti --out=soundsplay.js CollectionSieves-SplayTreeSet-removeLoop(RunTime): 73714.28571428572 us. CollectionSieves-SoundSplayTreeSet-removeLoop(RunTime): 73714.28571428572 us. DDK pkg/dev_compiler/tool/ddb -d -r chrome --enable-experiment=variance -k sieve.dart CollectionSieves-SplayTreeSet-removeLoop(RunTime): 29097.17391304348 CollectionSieves-SoundSplayTreeSet-removeLoop(RunTime): 22948.409090909092 us. Change-Id: Ie78febebe57295d7d5fd10e07d95da118f285cce Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/129303 Commit-Queue: Kallen Tu <kallentu@google.com> Reviewed-by: Leaf Petersen <leafp@google.com>
24 lines
913 B
Dart
24 lines
913 B
Dart
/// Marker interface for [Iterable] subclasses that have an efficient
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/// [length] implementation.
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abstract class EfficientLengthIterable<T> extends Iterable<T> {
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const EfficientLengthIterable();
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/// Returns the number of elements in the iterable.
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///
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/// This is an efficient operation that doesn't require iterating through
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/// the elements.
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int get length;
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}
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/// Creates errors throw by [Iterable] when the element count is wrong.
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abstract class IterableElementError {
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/// Error thrown thrown by, e.g., [Iterable.first] when there is no result.
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static StateError noElement() => StateError("No element");
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/// Error thrown by, e.g., [Iterable.single] if there are too many results.
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static StateError tooMany() => StateError("Too many elements");
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/// Error thrown by, e.g., [List.setRange] if there are too few elements.
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static StateError tooFew() => StateError("Too few elements");
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}
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