Programmer Group

TLDR TTI refers to the interactive time point between the user and the UI interface, which cannot be directly detected by the browser API. The key indicators of TTI are related to longtask, network status, FMP and quiet window. The TTI is comprehensively calculated by using the request agent and the browser MutationObserver. It's a good experi ...

First, before explaining the segment tree, you should understand that the segment tree should be a tool that can change the time complexity of O(N) into o (logN) for modifying and maintaining intervals (or segments). 1, Introduction of segment tree concept Segment tree is a binary tree, that is, for a segment, we will use a binary tree to ...

catalogue 1. Descendant selector 2. Sub element selector 3. Union selector 4. Pseudo class selector 4.1 link pseudo class 4.2: ficus pseudo class selector In CSS, selectors are divided into basic selectors and conforming selectors according to selector types. Compound selectors are formed by combining basic selectors based on basic sele ...

catalogue188. The best time to buy and sell stocks IVsubjectProblem solution 188. The best time to buy and sell stocks IV subject Given an array of integers   prices, its i-th element   prices[i] is the price of a given stock on day I. Design an algorithm to calculate the maximum profit you can make. You can complete up to k transacti ...

boost::scoped_ptr and std::auto_ptr is very similar. It is a simple smart pointer, which can ensure that the object is automatically released after leaving the scope. The following code demonstrates the basic application of this pointer: #include <string> #include <iostream> #include <boost/scoped_ptr.hpp> class implementati ...

catalogue 1, Please design a class that can only create objects on the heap 2, Designing a class can only create objects on the stack 3, Design a class that cannot be copied 4, Designing a class cannot be inherited 5, When designing a class, only one object can be instantiated         five point one   The singlet ...

Concept and definition of function What is a function? Function is to integrate a piece of code block with independent functions into a whole and name it, and call the name where needed to complete the corresponding requirements. In the development process of function, code reuse can be realized more efficiently. characteristic: In Python, ...

analysis ● 1. Observe and run for at least one day to see the slow production ● 2. Start the slow query log, set the threshold value, for example, slow SQL is more than 5 seconds, and grab it ● 3.explain + slow SQL analysis ● 4.show profile ● 5. Optimize the parameters of SQL database server (O & M or DBA) summary ● 1. Enable and capture ...

Hello, I'm hehaige. I focus on the back end. If I can, I want to be a code designer instead of an ordinary coder to witness the growth of hehaige. Your comments and praise are my biggest motivation. 1-1: title You are given an array prices where prices[i] is the price of a given stock on the ith day. Find the maximum profit you can achieve ...

catalogue 0 preparation: 1. Burn system image 1) Download system image 2) Format SD card 3) Write image using Etcher 4) Boot with SD card 2. Increase swap memory 3. View cuda version 4. clone darknet source code and compile   5. Torch and torch vision installation 6. Yolov5 environment construction 7. Tensorrt make & infere ...