Over the years I’ve seen a lot of code and worked on a lot of different projects, new or long running. Optimizing for speed and reducing memory requirements usually comes to mind only in the event of problems with a lack of it, or in the event of a drop in performance. Then we look for the simplest solution with minimal additional delay of the project. It is not always possible to fix a problem quickly and easily. This often requires re-architecting and changing code in a large number of places. Changing the architecture is quite a painful and demanding matter. He comes up for advice most often at the end. This is an advantage if there is not much duplication of code in the project, as it simplifies and speeds up changes.
The next article, I would
point out how to write more efficient and faster code right from the start. We will avoid possible delays and code optimizations during the project. The time consumption of writing an already efficient code is the same as writing an inefficient one. For this reason, it is more advantageous to write optimized code from the beginning.
Basic recommendations
We use a profiler to identify problem areas. It identifies the places where our code spends the most time. Even small changes over a large number of repetitions can affect performance. According to the profiler results, the most common bottlenecks are working with chains and long cycles. We should avoid using variables of type sweden phone number data String. We can use a numeric value or an enumeration instead. String manipulation is more complicated and time consuming. Therefore, it is more advantageous to define object IDs and object types as numeric values not only in Java but also in databases.
Stringwe use objects to store text information. Strings are often manipulated, added, changed recreation emerges as a necessary tool for designers or deleted. In the case of intensive use of these operations within cycles, the object is Stringvery efficient and fast. For these purposes, specialized bw lists classes were created StringBuilderand StringBuffer. Both classes are designed for intensive chain changes. StringBuffercompared to the class, it is StringBuildersynchronized and the team is also slower. The acceleration compared to the class Stringca.