天道酬勤,学无止境

cold-start

AWS Lambda: Identifying cold starts

Is there a clear way to identify "cold starts"? Either in runtime in the Lambda itself, or via the logs? I know that cold starts are characterized by longer runtimes, which I can actually see, but I'm looking for a clear cut way. I'm using Node.js if that matters. Update: There are two good answers below, for two use cases: - Identifying the cold start as the lambda runs. - Identifying the cold start from the CloudWatch log.

2021-06-02 05:51:46    分类:问答    amazon-web-services   aws-lambda   serverless   cold-start

How to keep desired amount of AWS Lambda function containers warm

On my project there is REST API which implemented on AWS API Gateway and AWS Lambda. As AWS Lambda functions are serverless and stateless while we make a call to it, AWS starts a container with code of the Lambda function which process our call. According AWS documentation after finishing of lambda function execution AWS don't stop the container and we are able to process next call in that container. Such approach improves performance of the service - only in time of first call AWS spend time to start container (cold start of Lambda function) and all next calls are executed faster because

2021-05-16 13:22:10    分类:问答    performance   amazon-web-services   aws-lambda   amazon-cloudwatch   cold-start

why my .net application horribly slow to start after the machine is rebooted?

Does anyone know why it is so horribly slow to start a .net application after the machine is rebooted(i.e cold start) ? After researching in google I found some clues for speeding it up i.e. Merging assemblies Setting resource language NGEN GAC installation, etc. Is that all enough to make my .net application faster or anything else is there I am missing ?

2021-05-02 05:43:25    分类:问答    c#   .net   wpf   xaml   cold-start

Android-防止启动时出现白屏(Android - Prevent white screen at startup)

问题 众所周知,许多Android应用程序在其第一个Activity成为焦点之前,都会非常短暂地显示白屏。 在以下情况下会出现此问题: 扩展全局Application类并在其中执行主要初始化的Android应用。 总是在第一个Activity之前创建Application对象(这可以在调试器中观察到),因此这很有意义。 这是我的案件延误的原因。 在初始屏幕之前显示默认预览窗口的Android应用。 设置android:windowDisablePreview = "true"显然在这里不起作用。 我也不能如此处所述将初始屏幕的父主题设置为Theme.Holo.NoActionBar ,因为[不幸的是]我的初始屏幕使用了ActionBar 。 同时,未扩展Application类的Application在启动时不会显示白屏。 问题是,理想情况下,在显示第一个Activity之前,需要发生在Application对象中执行的初始化。 所以我的问题是,如何在不使用Application对象的情况下在应用启动时执行这些初始化? 我想可能使用Thread或Service吗? 这是一个有趣的问题。 我不能以通常的方式绕过它(通过设置NoActionBar主题),因为由于一些不相关的原因,我的Splash屏幕实际上有一个ActionBar 。 笔记: 我已经提到以下问题:

2021-04-14 18:37:16    分类:技术分享    java   android   multithreading   performance   cold-start

Android emulator - Don't save state by default

In the latest update for Android studio, the emulator has started saving snapshots of the current state of the device by default and going back to that snapshot when reopened, which is not the behavior that I want. How can I disable that and go back to the previous behavior, where it just closes and resets the emulator? UI after hitting the X button to close Android Studio 3.0.1, with Emulator version 27.0.2 and HAXM 6.2.1

2021-04-06 04:33:33    分类:问答    android   android-studio   android-emulator   boot   cold-start

Android - Prevent white screen at startup

As we all know, many Android apps display a white screen very briefly before their first Activity comes into focus. This problem is observed in the following cases: Android apps that extend the global Application class and perform major initializations therein. The Application object is always created before the first Activity (a fact that can be observed in the debugger), so this makes sense. This is the cause of the delay in my case. Android apps that display the default preview window before the splash screen. Setting android:windowDisablePreview = "true" obviously does not work here. Nor

2021-03-28 07:35:15    分类:问答    java   android   multithreading   performance   cold-start