mirror of
https://github.com/firebase/firebase-ios-sdk
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68 lines
2.4 KiB
Objective-C
68 lines
2.4 KiB
Objective-C
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#import "PerfE2EScreenTracesViewController.h"
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/** Number of cells in the table view. */
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static const NSInteger kNumberOfCellsInTable = 200;
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/** Number of sections in the table view. */
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static const NSInteger kNumberOfSectionsInTable = 1;
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/** Defines X where every Xth cell on load causes a frozen frame. */
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static const NSInteger kIntervalOfCellThatCausesFrozenFrame = 15;
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/** Duration for which the main thread has to be stalled to deterministically cause a frozen frame.
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*/
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static const NSTimeInterval kThreadSleepDurationForFrozenFrame = 0.9;
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/** Duration for which the main thread has to be stalled to deterministically cause a slow frame. */
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static const NSTimeInterval kThreadSleepDurationForSlowFrame = 0.05;
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@interface PerfE2EScreenTracesViewController ()
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@end
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@implementation PerfE2EScreenTracesViewController
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#pragma mark - Table view data source
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- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
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return kNumberOfSectionsInTable;
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}
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- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
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return kNumberOfCellsInTable;
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}
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- (UITableViewCell *)tableView:(UITableView *)tableView
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cellForRowAtIndexPath:(NSIndexPath *)indexPath {
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// Not recycling cells so that this table view is deliberately slow.
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UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
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reuseIdentifier:nil];
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cell.textLabel.text = [NSString stringWithFormat:@"%ld", indexPath.row];
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cell.accessibilityIdentifier = [NSString stringWithFormat:@"cell_%ld", indexPath.row];
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// Adds a manual delay that slows down this method.
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if (indexPath.row % kIntervalOfCellThatCausesFrozenFrame == 0) {
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[NSThread sleepForTimeInterval:kThreadSleepDurationForFrozenFrame];
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} else {
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[NSThread sleepForTimeInterval:kThreadSleepDurationForSlowFrame];
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}
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return cell;
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}
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@end
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