擷取 Macrobenchmark 指標

@OptIn(ExperimentalMetricApi::class)
    @Test
    fun scrollComposeList() {
        benchmarkRule.measureRepeated(
            // [START_EXCLUDE]
            packageName = TARGET_PACKAGE,
            metrics = listOf(
                FrameTimingMetric(),
                // Measure power usage. This is supported on Pixel 6 and later.
                PowerMetric(PowerMetric.Type.Power(
                    mapOf(
                        PowerCategory.CPU to PowerCategoryDisplayLevel.TOTAL,
                        PowerCategory.DISPLAY to PowerCategoryDisplayLevel.TOTAL,
                        PowerCategory.GPU to PowerCategoryDisplayLevel.TOTAL,
                        PowerCategory.NETWORK to PowerCategoryDisplayLevel.TOTAL,
                    )
                )),
                // Measure custom trace sections by name EntryRow (which is added to the EntryRow composable).
                // Mode.Sum measures combined duration and also how many times it occurred in the trace.
                // This way, you can estimate whether a composable recomposes more than it should.
                TraceSectionMetric("EntryRowCustomTrace", TraceSectionMetric.Mode.Sum),
                // This trace section takes into account the SQL wildcard character %,
                // which can find trace sections without the full name.
                // This way, you can measure composables produced by the composition tracing
                // and measure how long they took and how many times they recomposed.
                // WARNING: This metric only shows results when running with composition tracing, otherwise it won't be visible in the outputs.
                TraceSectionMetric("%EntryRow%", TraceSectionMetric.Mode.Sum),
            ),
            // Try switching to different compilation modes to see the effect
            // it has on frame timing metrics.
            compilationMode = CompilationMode.None(),
            startupMode = StartupMode.WARM, // restarts activity each iteration
            iterations = DEFAULT_ITERATIONS,
            // [END_EXCLUDE]
            setupBlock = {
                uiAutomator {
                    // Before starting to measure, navigate to the UI to be measured.
                    startIntent(Intent("$packageName.COMPOSE_ACTIVITY"))
                }
            }
        ) {
            uiAutomator {
                onElement { isScrollable }.fling(Direction.DOWN)
            }
        }
    }

@Composable
private fun EntryRow(entry: Entry, modifier: Modifier = Modifier) = trace("EntryRowCustomTrace") {
    Card(modifier = modifier) {
        Row(verticalAlignment = Alignment.CenterVertically) {
            Text(
                text = entry.contents,
                modifier = Modifier
                    .padding(16.dp)
                    .wrapContentSize()
            )

            Spacer(modifier = Modifier.weight(1f))

            Checkbox(
                checked = false,
                onCheckedChange = {},
                modifier = Modifier.padding(16.dp)
            )
        }
    }
}

frameDurationCpuMs P50 3.5, P90 6.0, P95 6.4, P99 11.0
frameOverrunMs P50 -11.6, P90 -7.2, P95 -7.1, P99 -1.2

EntryRowCustomTraceCount min 20.0, median 28.0, max 50.0
EntryRowCustomTraceSumMs min 34.9, median 44.4, max 66.6

powerCategoryCpuUw min 300.2, median 346.1, max 519.6
powerCategoryDisplayUw min 319.8, median 325.8, max 329.7
powerCategoryGpuUw min 18.8, median 23.3, max 36.9
powerCategoryNetworkUw min 97.3, median 123.3, max 681.3
powerTotalUw min 1234.8, median 1316.6, max 2112.4
powerUnselectedUw       min  483.3,  median  512.6,  max  561.7