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Reduce noise on complex_layout_scroll_perf__timeline_summary (#20400)

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See https://github.com/flutter/flutter/issues/19434
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Ian Hickson 2018-08-12 00:14:33 -07:00 committed by GitHub
parent 140d50f6ea
commit afb613774d
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1 changed files with 7 additions and 2 deletions
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9
dev/benchmarks/complex_layout/test_driver/scroll_perf_test.dart
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@ -20,19 +20,24 @@ void main() {
});
Future<Null> testScrollPerf(String listKey, String summaryName) async {
// The slight initial delay avoids starting the timing during a
// period of increased load on the device. Without this delay, the
// benchmark has greater noise.
// See: https://github.com/flutter/flutter/issues/19434
await new Future<Null>.delayed(const Duration(milliseconds: 250));
final Timeline timeline = await driver.traceAction(() async {
// Find the scrollable stock list
final SerializableFinder list = find.byValueKey(listKey);
expect(list, isNotNull);
// Scroll down
for (int i = 0; i < 5; i++) {
for (int i = 0; i < 5; i += 1) {
await driver.scroll(list, 0.0, -300.0, const Duration(milliseconds: 300));
await new Future<Null>.delayed(const Duration(milliseconds: 500));
}
// Scroll up
for (int i = 0; i < 5; i++) {
for (int i = 0; i < 5; i += 1) {
await driver.scroll(list, 0.0, 300.0, const Duration(milliseconds: 300));
await new Future<Null>.delayed(const Duration(milliseconds: 500));
}