mirror of https://github.com/status-im/metro.git
48 lines
1.3 KiB
JavaScript
48 lines
1.3 KiB
JavaScript
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*/
|
|
'use strict';
|
|
|
|
const execFile = require('child_process').execFile;
|
|
const fs = require('fs');
|
|
const path = require('path');
|
|
|
|
module.exports = function(req, res, next) {
|
|
if (req.url !== '/cpu-profile') {
|
|
next();
|
|
return;
|
|
}
|
|
|
|
console.log('Dumping CPU profile information...');
|
|
var dumpName = '/tmp/cpu-profile_' + Date.now();
|
|
fs.writeFileSync(dumpName + '.json', req.rawBody);
|
|
|
|
var cmdPath = path.join(
|
|
__dirname,
|
|
'../react-native-github/JSCLegacyProfiler/json2trace'
|
|
);
|
|
execFile(
|
|
cmdPath,
|
|
[
|
|
'-cpuprofiler',
|
|
dumpName + '.cpuprofile ' + dumpName + '.json'
|
|
],
|
|
function(error) {
|
|
if (error) {
|
|
console.error(error);
|
|
res.end('Unknown error: ' + error.message);
|
|
} else {
|
|
var response = 'Your profile was generated at\n\n' + dumpName + '.cpuprofile\n\n' +
|
|
'Open `Chrome Dev Tools > Profiles > Load` and select the profile to visualize it.';
|
|
console.log(response);
|
|
res.end(response);
|
|
}
|
|
}
|
|
);
|
|
};
|