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View Code? Open in Web Editor NEWA test suite comparing the performance of Combine and RxSwift
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The timings appear to be generated in Debug
In Release builds, the Combine timings are about the same (since Combine is shipped as a Release build from Apple) but the RxSwift timings are roughly 3-5 times faster.
Add on-device test results?
I just built this project and its tests in Release mode, and ran it on an iPhone Xs Max running iOS 13 beta 5 (build 17A5547d). Here's my results, if you'd like to add them to the project/post.
2019-08-07 11:13:01.663002-0700 SpeedTest[686:332338] Launching with XCTest injected. Preparing to run tests.
2019-08-07 11:13:01.678508-0700 SpeedTest[686:332338] Waiting to run tests until the app finishes launching.
Test Suite 'All tests' started at 2019-08-07 11:13:01.831
Test Suite 'SpeedTestTests.xctest' started at 2019-08-07 11:13:01.831
Test Suite 'CombineTests' started at 2019-08-07 11:13:01.831
Test Case '-[SpeedTestTests.CombineTests testCombineLatestCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testCombineLatestCreating]' measured [Time, seconds] average: 0.317, relative standard deviation: 6.035%, values: [0.373770, 0.315254, 0.311101, 0.313436, 0.308780, 0.308293, 0.310991, 0.309422, 0.308666, 0.308311], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testCombineLatestCreating]' passed (3.484 seconds).
Test Case '-[SpeedTestTests.CombineTests testCombineLatestPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testCombineLatestPumping]' measured [Time, seconds] average: 0.254, relative standard deviation: 6.278%, values: [0.301132, 0.246959, 0.246933, 0.246930, 0.247169, 0.256698, 0.248910, 0.247402, 0.247251, 0.251685], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testCombineLatestPumping]' passed (2.793 seconds).
Test Case '-[SpeedTestTests.CombineTests testFlatMapLatestCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testFlatMapLatestCreating]' measured [Time, seconds] average: 0.174, relative standard deviation: 9.541%, values: [0.223468, 0.168516, 0.168904, 0.168670, 0.168296, 0.168805, 0.168205, 0.167899, 0.166943, 0.167873], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testFlatMapLatestCreating]' passed (1.990 seconds).
Test Case '-[SpeedTestTests.CombineTests testFlatMapLatestPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testFlatMapLatestPumping]' measured [Time, seconds] average: 0.666, relative standard deviation: 2.373%, values: [0.713103, 0.658805, 0.659432, 0.661265, 0.660234, 0.660054, 0.661817, 0.661364, 0.660532, 0.661145], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testFlatMapLatestPumping]' passed (6.909 seconds).
Test Case '-[SpeedTestTests.CombineTests testFlatMapsCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testFlatMapsCreating]' measured [Time, seconds] average: 0.119, relative standard deviation: 13.664%, values: [0.167399, 0.113666, 0.113355, 0.113330, 0.113366, 0.113154, 0.113349, 0.113165, 0.113210, 0.113298], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testFlatMapsCreating]' passed (1.439 seconds).
Test Case '-[SpeedTestTests.CombineTests testFlatMapsPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testFlatMapsPumping]' measured [Time, seconds] average: 0.368, relative standard deviation: 4.310%, values: [0.415549, 0.362704, 0.363176, 0.361723, 0.362332, 0.363070, 0.363443, 0.363041, 0.362221, 0.362598], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testFlatMapsPumping]' passed (3.932 seconds).
Test Case '-[SpeedTestTests.CombineTests testMapFilterCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testMapFilterCreating]' measured [Time, seconds] average: 0.114, relative standard deviation: 15.577%, values: [0.166588, 0.107760, 0.107645, 0.107777, 0.107944, 0.107716, 0.107834, 0.107345, 0.107410, 0.107330], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testMapFilterCreating]' passed (1.387 seconds).
Test Case '-[SpeedTestTests.CombineTests testMapFilterPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testMapFilterPumping]' measured [Time, seconds] average: 0.146, relative standard deviation: 11.349%, values: [0.195804, 0.140595, 0.140445, 0.140486, 0.140395, 0.140572, 0.140685, 0.140616, 0.140502, 0.140615], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testMapFilterPumping]' passed (1.713 seconds).
Test Case '-[SpeedTestTests.CombineTests testPublishSubjectCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testPublishSubjectCreating]' measured [Time, seconds] average: 0.217, relative standard deviation: 8.163%, values: [0.269519, 0.210303, 0.210658, 0.210114, 0.210629, 0.210665, 0.210536, 0.210768, 0.210886, 0.210952], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testPublishSubjectCreating]' passed (2.417 seconds).
Test Case '-[SpeedTestTests.CombineTests testPublishSubjectPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testPublishSubjectPumping]' measured [Time, seconds] average: 0.126, relative standard deviation: 13.366%, values: [0.176685, 0.120584, 0.120393, 0.120398, 0.120567, 0.120582, 0.120625, 0.120456, 0.120588, 0.120272], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testPublishSubjectPumping]' passed (1.513 seconds).
Test Case '-[SpeedTestTests.CombineTests testPublishSubjectPumpingTwoSubscriptions]' started.
<unknown>:0: Test Case '-[SpeedTestTests.CombineTests testPublishSubjectPumpingTwoSubscriptions]' measured [Time, seconds] average: 0.213, relative standard deviation: 8.093%, values: [0.264186, 0.206561, 0.206730, 0.206495, 0.206359, 0.206669, 0.206638, 0.206718, 0.206959, 0.208698], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.CombineTests testPublishSubjectPumpingTwoSubscriptions]' passed (2.378 seconds).
Test Suite 'CombineTests' passed at 2019-08-07 11:13:31.788.
Executed 11 tests, with 0 failures (0 unexpected) in 29.955 (29.956) seconds
Test Suite 'RxSwiftTests' started at 2019-08-07 11:13:31.788
Test Case '-[SpeedTestTests.RxSwiftTests testCombineLatestCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testCombineLatestCreating]' measured [Time, seconds] average: 0.424, relative standard deviation: 4.463%, values: [0.480355, 0.417623, 0.417502, 0.417144, 0.417412, 0.417046, 0.417352, 0.417095, 0.417495, 0.417291], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testCombineLatestCreating]' passed (4.489 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testCombineLatestPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testCombineLatestPumping]' measured [Time, seconds] average: 0.244, relative standard deviation: 7.176%, values: [0.297019, 0.238397, 0.238588, 0.238113, 0.239896, 0.240161, 0.238805, 0.236376, 0.238680, 0.238684], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testCombineLatestPumping]' passed (2.697 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapLatestCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapLatestCreating]' measured [Time, seconds] average: 0.166, relative standard deviation: 11.201%, values: [0.221616, 0.159861, 0.159359, 0.159367, 0.159202, 0.160056, 0.159847, 0.159774, 0.159760, 0.159958], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapLatestCreating]' passed (1.911 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapLatestPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapLatestPumping]' measured [Time, seconds] average: 0.569, relative standard deviation: 2.964%, values: [0.619199, 0.562502, 0.563592, 0.561449, 0.563635, 0.560609, 0.563452, 0.563670, 0.563945, 0.565810], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapLatestPumping]' passed (5.940 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapsCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapsCreating]' measured [Time, seconds] average: 0.158, relative standard deviation: 10.053%, values: [0.205639, 0.153024, 0.152946, 0.152780, 0.152942, 0.152866, 0.152381, 0.152329, 0.152604, 0.152438], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapsCreating]' passed (1.832 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapsPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapsPumping]' measured [Time, seconds] average: 0.522, relative standard deviation: 3.159%, values: [0.570750, 0.517117, 0.514583, 0.515876, 0.517330, 0.514596, 0.515429, 0.516117, 0.519115, 0.514222], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testFlatMapsPumping]' passed (5.467 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testMapFilterCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testMapFilterCreating]' measured [Time, seconds] average: 0.130, relative standard deviation: 12.899%, values: [0.179818, 0.124204, 0.124040, 0.124229, 0.124294, 0.123647, 0.124333, 0.124075, 0.123292, 0.124630], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testMapFilterCreating]' passed (1.549 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testMapFilterPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testMapFilterPumping]' measured [Time, seconds] average: 0.129, relative standard deviation: 13.754%, values: [0.182531, 0.123416, 0.123589, 0.123505, 0.123656, 0.123497, 0.123388, 0.121803, 0.123525, 0.123406], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testMapFilterPumping]' passed (1.544 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testPublishSubjectCreating]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testPublishSubjectCreating]' measured [Time, seconds] average: 0.219, relative standard deviation: 8.262%, values: [0.273149, 0.212711, 0.212802, 0.212842, 0.212670, 0.212838, 0.212886, 0.213015, 0.213080, 0.212935], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testPublishSubjectCreating]' passed (2.441 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testPublishSubjectPumping]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testPublishSubjectPumping]' measured [Time, seconds] average: 0.203, relative standard deviation: 8.249%, values: [0.252791, 0.197036, 0.196841, 0.197075, 0.196869, 0.197041, 0.196938, 0.197119, 0.197845, 0.196916], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testPublishSubjectPumping]' passed (2.278 seconds).
Test Case '-[SpeedTestTests.RxSwiftTests testPublishSubjectPumpingTwoSubscriptions]' started.
<unknown>:0: Test Case '-[SpeedTestTests.RxSwiftTests testPublishSubjectPumpingTwoSubscriptions]' measured [Time, seconds] average: 0.361, relative standard deviation: 4.768%, values: [0.412536, 0.357086, 0.356588, 0.355424, 0.354889, 0.354509, 0.355141, 0.353818, 0.354854, 0.354913], performanceMetricID:com.apple.XCTPerformanceMetric_WallClockTime, baselineName: "", baselineAverage: , maxPercentRegression: 10.000%, maxPercentRelativeStandardDeviation: 10.000%, maxRegression: 0.100, maxStandardDeviation: 0.100
Test Case '-[SpeedTestTests.RxSwiftTests testPublishSubjectPumpingTwoSubscriptions]' passed (3.862 seconds).
Test Suite 'RxSwiftTests' passed at 2019-08-07 11:14:05.797.
Executed 11 tests, with 0 failures (0 unexpected) in 34.008 (34.009) seconds
Test Suite 'SpeedTestTests.xctest' passed at 2019-08-07 11:14:05.797.
Executed 22 tests, with 0 failures (0 unexpected) in 63.963 (63.965) seconds
Test Suite 'All tests' passed at 2019-08-07 11:14:05.797.
Executed 22 tests, with 0 failures (0 unexpected) in 63.963 (63.966) seconds
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