flutter/dev/benchmarks/microbenchmarks/lib/foundation/clamp.dart
Michael Goderbauer 5491c8c146
Auto-format Framework (#160545)
This auto-formats all *.dart files in the repository outside of the
`engine` subdirectory and enforces that these files stay formatted with
a presubmit check.

**Reviewers:** Please carefully review all the commits except for the
one titled "formatted". The "formatted" commit was auto-generated by
running `dev/tools/format.sh -a -f`. The other commits were hand-crafted
to prepare the repo for the formatting change. I recommend reviewing the
commits one-by-one via the "Commits" tab and avoiding Github's "Files
changed" tab as it will likely slow down your browser because of the
size of this PR.

---------

Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
2024-12-19 20:06:21 +00:00

73 lines
2.1 KiB
Dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/foundation.dart' show clampDouble;
import '../common.dart';
const int _kBatchSize = 100000;
const int _kNumIterations = 1000;
Future<void> execute() async {
assert(false, "Don't run benchmarks in debug mode! Use 'flutter run --release'.");
final BenchmarkResultPrinter printer = BenchmarkResultPrinter();
final Stopwatch watch = Stopwatch();
{
final List<double> clampDoubleValues = <double>[];
for (int j = 0; j < _kNumIterations; ++j) {
double tally = 0;
watch.reset();
watch.start();
for (int i = 0; i < _kBatchSize; i += 1) {
tally += clampDouble(-1.0, 0.0, 1.0);
tally += clampDouble(2.0, 0.0, 1.0);
tally += clampDouble(0.0, 0.0, 1.0);
tally += clampDouble(double.nan, 0.0, 1.0);
}
watch.stop();
clampDoubleValues.add(watch.elapsedMicroseconds.toDouble() / _kBatchSize);
if (tally < 0.0) {
print("This shouldn't happen.");
}
}
printer.addResultStatistics(
description: 'clamp - clampDouble',
values: clampDoubleValues,
unit: 'us per iteration',
name: 'clamp_clampDouble',
);
}
{
final List<double> doubleClampValues = <double>[];
for (int j = 0; j < _kNumIterations; ++j) {
double tally = 0;
watch.reset();
watch.start();
for (int i = 0; i < _kBatchSize; i += 1) {
tally += -1.0.clamp(0.0, 1.0);
tally += 2.0.clamp(0.0, 1.0);
tally += 0.0.clamp(0.0, 1.0);
tally += double.nan.clamp(0.0, 1.0);
}
watch.stop();
doubleClampValues.add(watch.elapsedMicroseconds.toDouble() / _kBatchSize);
if (tally < 0.0) {
print("This shouldn't happen.");
}
}
printer.addResultStatistics(
description: 'clamp - Double.clamp',
values: doubleClampValues,
unit: 'us per iteration',
name: 'clamp_Double_clamp',
);
}
printer.printToStdout();
}