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  Understanding PGO in GoLang 1.20

Background The Go 1.20 version was officially released in February 2023, it introduced the PGO(Profile Guided Optimization) mechanism. The basic principle of PGO can be divided into the following two steps: First, profiling is performed on the program to collect data about the program's runtime and generate a profiling file. When compiling the program, enable the PGO option, and the compiler will optimize the program's performance based on the content in the .pgo file. When compiling a program...

   GO 1.20,PGO,GOLANG     2023-02-28 04:27:46

  Apple will shut down Ping on 30th September

What? Apple also has social networks! Yes. Unfortunately, you just heard it and it is to be shut down. In fact, Apple launched Ping not too long ago, in September 2010, it was released together with iTunes 10.Ping allows users to share with your friends the music you are listening to, and you can even share concerts and activities information, and it supports for picture and link sharing. In addition, Ping also includes the "Top Ten" list of features that can be customized, each singer and the ...

   Apple,Ping,Social network     2012-09-12 22:21:31

  PHP buffer: output_buffering and ob_start

buffer is one piece of memory section, it is usually 4Kb in Linux. It is mainly used between different devices with different speed or different priorities. With buffer, the waiting time between different processes will be reduced. Here is one simple example, when you type something in a text editor, every time when you type a character, the operating system will not write it to the disk directly, instead it will write it to buffer first When the buffer is full, the data in the buffer will be wr...

   PHP buffer,output_buffering,ob_start     2013-06-20 22:54:15

  Marissa Mayer brings 3rd Googler to Yahoo

In Marissa Mayer's plan reviving Yahoo, the focus on products is well known. It is generally expected that the reviving plan will start from Flickr. Mayer recently appeared in the Flickr team, and talked to Flickr designers. It means that Mayer now starts the formal implementation of her product strategy.After communicating with the entire team, Mayer talked to Flickr designer separately, but details are unknown. As shown below:: Mayer once again brings Yahoo the third Googler: Andrew Schulte. ...

   Googler,Yahoo,Marissa Mayer, Flickr,Andrew Schulte     2012-08-21 06:04:21

  Multithreading interview questions in Java

Multithreading as a widespread programming and execution model allows multiple threads to exist within the context of a single process. These threads share the process' resources but are able to execute independently. The threaded programming model provides developers with a useful abstraction of concurrent execution. However, perhaps the most interesting application of the technology is when it is applied to a single process to enable parallel execution on a multiprocessor system.Many programme...

   Multithreading,Java,Interview     2012-05-28 06:33:25

  How to make contribution to GitHub correctly?

If you have a GitHub account, then you will be able to see a section called Public contributions on your profile page. Your contribution status for the past year will be showed on this section, it's called contribution calendar. This calendar has 7 rows and 53 columns. Each cell on the grid represents your contribution status for one day, if the contribution is different, the cell color will be different. There are 5 colors in total : white, yellow, light green,green and deep green. With this, s...

   GitHub,Contribution calendar,Public contributions     2013-09-27 10:47:11

  North Korea Government website costs only $15

Wired reports that the North Korean government is not occlusion as people imagine. Recently, some users found that the North Korean government has an official website in English, URL is www.korea-dpr.com. The Korean government hopes to launch an official website to carry forward its "ideology".The site design looks very good and fully functional. It has big improvment relative to their news release website Korea News.The report also pointed out that the official website was developed by the Nor...

   Nprth Koreea,Website,Price     2012-04-20 01:43:34

  Fix External Monitor Flickering on MacBook M4 Pro

Recently got a new MacBook M4 Pro and everything works fine until one day suddenly noticing the screen started to be flickering and never stops, realizing it might be some problem happening, so started to try to see whether it's just a glitch or persisting issue. Tried to do following: Turn off the external monitor off and then on Plug out the HDMI cable of the external monitor and plug in back Restart the MacBook M4 Pro These all failed to work, the issue still happens. So was following diffe...

   MACBOOK M4,MONITOR FLICKERING     2024-11-19 21:31:16

  Commonly used AJAX frameworks

Have you ever wondered to design your website like desktop applications? Fortunately, with AJAX we can achieve this. By using AJAX, we no need to refresh the whole page when we just want to update a portion of a website such as the weather information or news panel. This makes our web apps look like desktop applications and bring good user experience to our visitors. You can create an XMLHttpRequest object every time when you want to initialize an AJAX call, unfortunately you may need repeat eve...

   AJAX,framework,jQuery,Dojo,YUI     2012-06-27 04:40:05

  Resolve git issue git@github.com: Permission denied (publickey)

Sometimes when clone a remote repository from github.com, you may see below error. D:\Project\Playground\GitBisect>git clone git@github.com:bradleyboy/bisectercise.git Cloning into 'bisectercise'... git@github.com: Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. The issue occurs when there is no key on your machine which is associated with your github account. To fix the issue, please ...

   GIT,GITHUB,PERMISSION DENIED,PUBLIC KEY     2019-07-12 10:10:49

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