如何检查 Node js 中的下载时间和执行?
How to check download time and execution in Node js?
我想检查每个文件的下载时间和所有文件的下载时间,如果下载速度慢或快,我们如何在节点js上查看和测量它?也可以考虑内存会更好。谢谢你。顺便说一句,下面代码中的 final_list 是一个 url 数组。
我的下载文件代码
var download = function (url, dest, callback) {
request.get(url)
.on('error', function (err) { console.log(err) })
.pipe(fs.createWriteStream(dest))
.on('close', callback);
};
final_list.forEach(function (str) {
var filename = str.split('/').pop();
console.log('Downloading ' + filename);
download(str, filename, function () { console.log('Finished Downloading' + "" + filename) });
});
计时方式:
测量内存
这是使用上述所有方法更新的代码。
final_list.forEach(function (str) {
var filename = str.split('/').pop();
console.log('Downloading ' + filename);
// console.time(filename);
var start = process.hrtime.bigint();
download(str, filename, function () {
console.log('Finished Downloading' + "" + filename)
// console.timeEnd(filename);
var end = process.hrtime.bigint();
var took = Number(end - start) / 1000000;
console.log(`${filename}: ${took}ms`);
console.log('Total used memory:', process.memoryUsage().heapUsed);
});
});
我想检查每个文件的下载时间和所有文件的下载时间,如果下载速度慢或快,我们如何在节点js上查看和测量它?也可以考虑内存会更好。谢谢你。顺便说一句,下面代码中的 final_list 是一个 url 数组。
我的下载文件代码
var download = function (url, dest, callback) {
request.get(url)
.on('error', function (err) { console.log(err) })
.pipe(fs.createWriteStream(dest))
.on('close', callback);
};
final_list.forEach(function (str) {
var filename = str.split('/').pop();
console.log('Downloading ' + filename);
download(str, filename, function () { console.log('Finished Downloading' + "" + filename) });
});
计时方式:
测量内存
这是使用上述所有方法更新的代码。
final_list.forEach(function (str) {
var filename = str.split('/').pop();
console.log('Downloading ' + filename);
// console.time(filename);
var start = process.hrtime.bigint();
download(str, filename, function () {
console.log('Finished Downloading' + "" + filename)
// console.timeEnd(filename);
var end = process.hrtime.bigint();
var took = Number(end - start) / 1000000;
console.log(`${filename}: ${took}ms`);
console.log('Total used memory:', process.memoryUsage().heapUsed);
});
});