Technology pervades our everyday lives, from the most basic apps to the most revolutionary breakthroughs. In this guide, we will help you get started with C# in 2021. Given the massive quantity of C # and the exponential increase in data, considerable optimization work has been required at certain points.
Most significant advances come from fundamentally rethinking an issue and tackling it from an entirely fresh perspective.
However, today we’d like to provide some C # development advice.
- Every developer should be familiar with the use of a profiler.
There are various excellent.NET profilers available. We utilize the Jet Brains team’s dotTrace profiler. We know Jason on our team also benefits significantly from the Red Gate profiler. Every developer should install and utilize a profiler.
When we first suspected that the section was slowing down, we thought it was somewhere in one place, but when we found out that was not the case, we began to lose count of how many times we’d suspected the incorrect position. Profilers aid in this endeavor. Additionally, it has occasionally assisted me in locating problems — a sluggish portion was only slow because it was acting improperly (which was not detected adequately by a unit test).
It is the initial and most required step in any optimization job you do.
- As the level increases, the speed decreases (usually).
It is only a scent that we detected. The higher the degree of abstraction, the slower the process will frequently be. A frequent example that we discovered is using LINQ during a busy code section (perhaps inside a loop being called millions of times). While LINQ is excellent for rapidly expressing something that might otherwise need several lines of code, it frequently sacrifices speed.
Please don’t get me wrong-LINQ is fantastic for quickly producing functional applications. However, you may be giving away too much in performance-critical areas of your codebase. In particular, given how simple it is to link together so many tasks.
We had a specific scenario in which we were utilizing a
SelectMany ().
Distinct ().
Count ((). Given that this was being called tens of millions of times, it quickly accumulated to a significant portion of the running time. We adopted a different method and significantly decreased the execution time.
- Consider the larger picture
There are some very unique algorithms available. Most of them are unnecessary on a daily or even monthly basis. It is, nevertheless, useful to be aware that they exist. All too frequently, after conducting studies, we uncover a far more effective method of resolving an issue. A developer who researches before coding is roughly as likely as a developer who conducts thorough analysis before creating code. We adore programming and are always tempted to delve directly into the IDE.
Additionally, while debugging performance issues, we frequently fixate on a particular line or procedure. It can be a mistake-looking at the broad picture can help you considerably increase performance by decreasing the amount of labor required.
- Avoid empty destructors.
The title is self-explanatory—avoid adding empty destructors to your classes. Each class with a destructor gets an item added to the finalize queue. Then, when the destructor is invoked, our old buddy GC is invoked to process the queue. An empty destructor indicates that all of this is for naught.
Bear in mind that, as previously said, GC execution is not inexpensive in terms of performance. Avoid creating unnecessary work for the GC.
- Avoid unnecessary boxing and unboxing
Boxing and unpacking are, like rubbish pickup, time-consuming operations. As a result, we wish to avoid unnecessarily doing them. However, what do they do?
Boxing is similar to constructing a reference type box and filling it with the value of a value type. In other words, it entails transforming a value type into an “object” or an interface type implemented by this value type. Unboxing is the inverse of unpacking; it opens the box and extracts the value type contained therein. Why is this a concern?
As previously stated, boxing and unpacking are costly procedures in and of themselves. Additionally, anytime you box a value, you generate another object on the heap, putting additional strain on—you guessed it!—the garbage collector.
Therefore, how can we prevent boxing and unboxing?
In general, you may do this by avoiding older.NET (version 1.0) APIs that predate generics and hence require the use of the object type. For example, instead of System.Collections.ArrayList uses generic collections such as System.Collections.Generic.ListT >.
- Exercise caution when string concatenation is used.
Strings are immutable in C #/.NET. Thus, whenever you do operations that appear to change a string, they create a new one. These procedures include the Replace and Substring methods, as well as concatenation.
Thus, the suggestion is straightforward—avoid concatenating many strings, particularly within a loop. In such cases, utilize the System.Text.StringBuilder class rather than the “+” operator. It ensures that no new instances are generated for each concatenated component.
- Stay tuned to the evolution of C #
To conclude, we offer some general advice: keep an eye on how the C # language grows and evolves. The C # team is continually releasing new features that improve performance.
A more contemporary example is the introduction of ref returns and ref locals in C # 7. These new functionalities enable developers to get objects by reference and save them in local variables. In C # 7.2, the Span type was added, which provides type-safe access to contiguous memory areas.
Despite being common in the C programming community, these new features and types offer little practical use to most C developers. Still, they can substantially impact the performance of important applications, and it is nevertheless worthwhile to be aware of them.
Conclusion
It has been a compilation of a few things we discovered beneficial for optimizing the performance of our.NET code-but it’s worth taking the time to look over your code and ensure it’s performant. Your team and consumers will appreciate it!
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