PerfettoResultsParser.kt
/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.benchmark.macro.perfetto
import androidx.benchmark.macro.IterationResult
import org.json.JSONObject
internal object PerfettoResultsParser {
fun parseStartupResult(jsonMetricResults: String, packageName: String): IterationResult {
val json = JSONObject(jsonMetricResults)
json.optJSONObject("android_startup")?.let { androidStartup ->
androidStartup.optJSONArray("startup")?.let { startup ->
for (i in 0 until startup.length()) {
val startupResult = startup.getJSONObject(i)
if (startupResult.optString("package_name") == packageName) {
// NOTE: we return the startup for this process, and ignore any more
return startupResult.parseStartupMetricsWithUiState()
}
}
}
}
return IterationResult(emptyMap(), emptyMap(), null)
}
private fun JSONObject.parseStartupMetricsWithUiState(): IterationResult {
val durMs = getJSONObject("to_first_frame").getDouble("dur_ms")
val fullyDrawnMs = optJSONObject("report_fully_drawn")?.getDouble("dur_ms")
val metricMap = mutableMapOf("startupMs" to durMs)
if (fullyDrawnMs != null) {
metricMap["fullyDrawnMs"] = fullyDrawnMs
}
val eventTimestamps = optJSONObject("event_timestamps")
val timelineStart = eventTimestamps?.optLong("intent_received")
val timelineEnd = eventTimestamps?.optLong("first_frame")
return IterationResult(
singleMetrics = metricMap,
sampledMetrics = emptyMap(),
timelineRangeNs = if (timelineStart != null && timelineEnd != null) {
timelineStart..timelineEnd
} else {
null
}
)
}
}