Created
May 12, 2022 13:33
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Script to run launch Android and retrieve some performance logs
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| const { exec } = require('child_process'); | |
| const _exec = async (command) => { | |
| return new Promise((res) => { | |
| exec(command, (error, stdout) => { | |
| if (error !== null) { | |
| console.log(`exec error: ${error}`); | |
| } | |
| res(stdout); | |
| }); | |
| }); | |
| }; | |
| const sleep = () => new Promise((res) => setTimeout(res, 10000)); | |
| const main = async () => { | |
| const clear = 'adb logcat -c'; | |
| const stop = 'adb shell am force-stop com.coinbase.android'; | |
| const open = 'adb shell monkey -p com.coinbase.android 1'; | |
| console.log('clearing logs'); | |
| await _exec(clear); | |
| for (let i = 0; i < 9; i++) { | |
| console.log('run - ', i); | |
| await _exec(open); | |
| await sleep(); | |
| await _exec(stop); | |
| } | |
| console.log('retrieving logs'); | |
| const logs = await _exec('adb logcat -d -s ReactNativeJS'); | |
| console.log('Result', logs.match(/mark.*\d\s/g)); | |
| return 0; | |
| }; | |
| main(); |
new PerformanceObserver((list) => {
const entries = list.getEntries();
entries.forEach((entry) => {
switch (entry.name) {
case 'nativeLaunchStart': {
performance.measure(
'nativeLaunch',
'nativeLaunchStart',
'nativeLaunchEnd',
);
// mark nativeLaunchStart in the legacy perf code if not already marked
if (!hasMark('nativeLaunchStart')) {
legacyMark('nativeLaunchStart', entry.startTime);
}
break;
}
case 'downloadEnd': {
performance.measure('download', 'downloadStart', 'downloadEnd');
break;
}
case 'bridgeSetupEnd': {
performance.measure(
'bridgeSetup',
'bridgeSetupStart',
'bridgeSetupEnd',
);
break;
}
case 'buildNativeModuleRegistryEnd': {
performance.measure(
'buildNativeModuleRegistry',
'buildNativeModuleRegistryStart',
'buildNativeModuleRegistryEnd',
);
break;
}
case 'runJsBundleEnd': {
performance.measure(
'runJsBundle',
'runJsBundleStart',
'runJsBundleEnd',
);
break;
}
case 'preRunJsBundleStart': {
performance.measure(
'createReactContext',
'createReactContextStart',
'preRunJsBundleStart',
);
break;
}
}
});
}).observe({ type: 'react-native-mark', buffered: true });
How to get the logs ref
import { PerformanceObserver } from 'react-native-performance';
const measureObserver = new PerformanceObserver((list, observer) => {
list.getEntries().forEach((entry) => {
console.log(`mark - ${entry.name} - ${entry.duration}ms`);
});
});
measureObserver.observe({ type: 'measure', buffered: true });
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Make sure to log with "mark ${eventName} - ${duration}"