Programmer Think

catalogue summary Preparatory knowledge Simulation environment preparation CPU full Memory leak deadlock Frequent thread switching summary summary Performance optimization has always been the focus of back-end service optimization, but online performance failure problems do not often occur, or due to business products, there is n ...

preface After a year, I found myself slack and didn't blog much. I also wanted to write the problems encountered in the project, but I didn't put them into action. Recently, I reconstructed some bad code of the project. When I'm free, it's also time to share the problems encountered in the project with you.Well, after nagging, today we wi ...

Memory bottleneck free free is to view memory usage, including physical memory, swap memory, and kernel buffer memory. free -h -s 3 means to output the memory every three seconds. The command is as follows [1014154@cc69dd4c5-4tdb5 ~]$ free total used free shared buff/cache available Mem: 119623656 ...

Accelerate the application expansion across GPUs within one computing node or across multiple GPUs. CUDA provides a large number of functions to realize multi GPU Programming, including: managing multiple devices in one or more processes, using unified virtual addressing to directly access the memory of other devices, GPUDirect, and overlappin ...

Open Tomcat management interface Modify Tomcat \ conf \ Tomcat users XML add user <role rolename="manager"/> <role rolename="manager-gui"/> <role rolename="admin"/> <role rolename="admin-gui"/> <user username="tomcat" password="tomcat" roles="admin-gui,admin,manager-gui,manager"/> Note: Tomcat9 also needs t ...

1, new/delete operator C + + implements global new/new [] and delete/delete [] to improve the access and management of dynamic memory. operator new can be a member function or global function of a class. Generally, the C + + runtime provides default global new/new [] and delete/delete [] implementations. Applications can also use custom implem ...

Msgpack / Jason performance data comparison MsgPack is an efficient binary serialization format. Like Jason, it can exchange data between languages and is used to serialize and store data. The advantage is that when the data scale is large, it is more efficient and occupies less resources than Jason; The disadvantage is that it is not easy to ...

Throttling definitionSome frequently operated events will affect performance. "Throttling" is used to control the response interval. When the event is triggered, the corresponding function will not be triggered immediately, but will execute the response function according to a specific time interval every time the response interval is ...

Performance optimization cases 1. Dichotomy search Ordered array lookup What is an ordered array? If the values in an array are arranged in a certain order, we call it an ordered array For example: array [2, 8, 15, 24, 66, 88, 100] Now I want to complete a function to find out whether a number exists in the array. For example: 24 ...

Why preload the View? Improve the startup speed of Activity and avoid parsing xml files every time. My idea is to preload and cache the layout of setContentView for each Activity. The next time you open the Activity again, you can reuse the previously loaded. Then there is a problem. We all know that each View will hold a reference to a Conte ...