| commit | 23b428de90c0759b5820a25c703a57e7367ed6a4 | [log] [tgz] |
|---|---|---|
| author | Alexander Thomas <athom@google.com> | Tue Jun 23 18:36:57 2020 +0200 |
| committer | Alexander Thomas <athom@google.com> | Thu Jun 25 12:40:03 2020 +0200 |
| tree | c263f365645a08dcc5d526ac57d11e11086999ac | |
| parent | 387fc0e5e302582fc7eb91324413c98f16cda4cb [diff] |
Migrate result emitter test
The Dart project benchmark harness is the recommended starting point when building a benchmark for Dart.
You can read more about Benchmarking the Dart VM.
By default, the reported runtime is not for a single call to run(), but for the average time it takes to call run() 10 times. The benchmark harness executes a 10-call timing loop repeatedly until 2 seconds have elapsed; the reported result is the average of the runtimes for each loop.
If you are running the same benchmark, on the same machine, running the same OS, the reported run times can be carefully compared across runs. Carefully because there are a variety of factors which could cause error in the run time, for example, the load from other applications running on your machine could alter the result.
Comparing the run time of different benchmarks is not recommended. In other words, don't compare apples with oranges.
BenchmarkBase class that all new benchmarks should extend1. Add the following to your project's pubspec.yaml
dependencies:
benchmark_harness: any
2. Install pub packages
pub install
3. Add the following import:
import 'package:benchmark_harness/benchmark_harness.dart';
4. Create a benchmark class which inherits from BenchmarkBase
Create a dart file in the benchmark/ folder of your package.
// Import BenchmarkBase class.
import 'package:benchmark_harness/benchmark_harness.dart';
// Create a new benchmark by extending BenchmarkBase
class TemplateBenchmark extends BenchmarkBase {
const TemplateBenchmark() : super('Template');
static void main() {
TemplateBenchmark().report();
}
// The benchmark code.
@override
void run() {
}
// Not measured setup code executed prior to the benchmark runs.
@override
void setup() { }
// Not measured teardown code executed after the benchmark runs.
@override
void teardown() { }
}
main() {
// Run TemplateBenchmark
TemplateBenchmark.main();
}
Template(RunTime): 0.1568472448997197 us.
This is the average amount of time it takes to run run() 10 times.
µs is an abbreviation for microseconds.
This package is carefully curated by the Dart team to exact specifications. Please open an issue with any proposed changes, before submitting a Pull Request.