This chapter discusses optimization techniques for C and C++ code developed for real-time and embedded systems. When arrays of structures are involved, the compiler performs a multiply by the structure size to
In C++, JetBrains Rider 2025.1 provides two kinds of code inspections: 341 inspections that detect errors such as broken syntax, unresolved symbols, compiler errors, and so on (you cannot configure or disable any of these inspections), and 1766 proprietary code inspections, any of which you can...
For an experienced programmer, it will usually be quite easy to find out the portions where a program requires the most optimization attention. But there are a lot of tools also available for detecting those parts of a program. I have used Visual C ++ IDE's in-built profiler to find out...
Although a number of guidelines are available for C code optimization, there is no substitute for having a thorough knowledge of the compiler and machine for which you are programming. Often, speeding up a program can also cause the code's size to increase. This increment in code size can a...
The replacement of a function call by a copy of the code of the function can be an effective optimization, particularly if execution speed is the priority. This article takes a look at how inlining works, when it can be effective, and how it may happen automatically in C and C++. Inlinin...
CoCreateInstance ( CLSID_MyObject, NULL, CLSCTX_INPROC_SERVER, IID_IMyObject, (void**)&m_pIMyObject ); is conceptually equivalent to the following C++ code: ISomeInterface* pISomeInterface = NULL; pISomeInterface = new CSomeObject(); In the first case, we are saying to the COM sub-sy...
The decision is typically based on various factors, such as the size of the function and optimization settings. The main purpose of using inline is to optimize small, frequently called functions by inserting their code directly at the call site, thereby avoiding the overhead of a function call...
How to Use an ArrayPool for Memory Optimization Now, let’s see how we can use an array from the pool: varpool = ArrayPool<int>.Shared; vararraySize =10; vararray = pool.Rent(arraySize); for(vari =0; i<arraySize; i++)
t have to be contiguous. This way it can find multiple independent expressions and hoist/sink them. Besides reducing code size, the early hoisting/sinking can expose other optimization opportunities, such as replacing a branch by a conditional move expression (CMOV), as shown in the follo...
In subject area: Computer Science Code Improvement, also known as optimization, is the process of transforming a program to compute the same result more efficiently, either by executing it more quickly or using less memory. It involves making improvements to the code, such as reducing the number...