Programmer Think

Source code interpretationThe readme of concurrent map says that this is a high-performance concurrent security map. Let's look at the source code to explain how it achieves high performance.https://github.com/orcaman/concurrent-map/blob/master/concurrent_map.goThe source code is quite concise, only 343 lines. Let's first look at how to design ...

  summary The core source code of freeswitch is developed based on apr library, which has good portability on different systems. Hash table is widely used in development. The main scenario is the logic that requires high query efficiency. It is a typical data structure implementation of space for time. Most of the underlying libraries hav ...

preface HashMap has always been a classic topic that must be asked in the interview. We can't just use it for use. We should also be clear about the underlying principles and possible problems. There are many explanations on HashMap thread safety on the Internet. Why should I talk about this article? Because I want to be more simple and clear. ...

Java7 HashMap HashMap is the simplest. First, we are very familiar with it. Second, it does not support concurrent operations, so the source code is also very simple. First, let's use the following figure to introduce the structure of HashMap. This is only a schematic diagram, because it does not take into account the expansion of the ar ...

The difference between HashMap in JDK1.8 and JDK1.7 conclusion First of all, the biggest difference between HashMap in 1.7 and 1.8 is the change of underlying data structure. The underlying data structure used by HashMap in 1.7 is the form of array + Chain table, whereas in 1.8 HashMap uses the data structure of array + Chain Table + red-blac ...