`For` vs. `Foreach` Loops in .NET: Which is Faster?

.NET for The performance of foreach cycle and

cycle: Which is faster?

In C# and other .NET languages, when selecting the circular structure iterative collection, it often encounters questions about which cycle type performance is higher. Although the cycle is faster than the for cycle, the actual performance may vary from the collection type and specific scene. foreach

Specific scenarios and performance are relatively

According to the empirical test conducted by Patrick Smacchia, the following performance comparison:

• cycle: In the collection of generic lists, the List<T> cycle is slightly slower than the for cycle, and the performance difference is about 2 times. for foreach cycle:
In the generic and non -generic arrays, the performance of the
• cycle is significantly higher than the cycle, and the speed is increased by about double. for Comprehensive results: for foreach
cycle than
• in the set cycle is about 5 times faster than the set. for List<T> Factors affecting performance foreach

The performance differences between the cycle and

cycle can be attributed to the following factors:

iterative expenses:

for The cycle has additional overhead related to the enumeration process, which will affect the execution time. foreach

Optimization of array: The array in

.NET has been optimized by performance. Compared with other collection types, it can access elements faster.
• Compiler Optimization: The compiler may optimize the foreach cycle more effectively than the
cycle, thereby improving performance.
• Conclusion
• Although cycles are usually provided to provide better performance when iterates in .NET, the actual speed difference may depend on the specific collection type and scene. For applications that are sensitive to performance (very important per millisecond), it is recommended to conduct a benchmark test for different types of cycles and select a cycle of the optimal execution speed.

The above is the detailed content of `For` vs. `Foreach` Loops in .NET: Which is Faster?. For more information, please follow other related articles on the PHP Chinese website!