


Cache-Friendly vs. Cache-Unfriendly Code: What's the Difference and How to Write Efficient Code?
What is the Difference Between "Cache Unfriendly Code" and "Cache Friendly" Code?
When data is accessed frequently, it is desirable to store it in a cache for faster access. However, if data is accessed in a way that conflicts with the way the cache works, performance can suffer.
Cache-unfriendly code accesses data in a way that does not take advantage of cache memory. This can happen when data is accessed in a non-sequential way, or when data is accessed from multiple threads simultaneously.
Cache-friendly code accesses data in a way that maximizes the use of cache memory. This means accessing data in a sequential way, and avoiding accessing data from multiple threads simultaneously.
How to Write Cache-efficient Code?
Here are some tips for writing cache-efficient code:
- Use appropriate C containers.
- Don't neglect the cache in data structure and algorithm design.
- Know and exploit the implicit structure of data.
- Avoid unpredictable branches.
- Avoid virtual functions.
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C is still important in modern programming because of its efficient, flexible and powerful nature. 1)C supports object-oriented programming, suitable for system programming, game development and embedded systems. 2) Polymorphism is the highlight of C, allowing the call to derived class methods through base class pointers or references to enhance the flexibility and scalability of the code.

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C isnotdying;it'sevolving.1)C remainsrelevantduetoitsversatilityandefficiencyinperformance-criticalapplications.2)Thelanguageiscontinuouslyupdated,withC 20introducingfeatureslikemodulesandcoroutinestoimproveusabilityandperformance.3)Despitechallen

C is widely used and important in the modern world. 1) In game development, C is widely used for its high performance and polymorphism, such as UnrealEngine and Unity. 2) In financial trading systems, C's low latency and high throughput make it the first choice, suitable for high-frequency trading and real-time data analysis.

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