What caching methods do you prefer to use in your projects and why?

In Go, the following approaches are often used for caching:

• Built-in data structures with synchronization: for example, map with sync.RWMutex for thread-safe access.
• Third-party libraries: for example, golang-lru for implementing an LRU cache that automatically removes the least used items.
• sync.Map: a thread-safe map from the standard library, convenient for caches with high contention.

The choice depends on the task:

• For a simple cache with access control — map + sync.RWMutex.
• For a cache with size limits and automatic removal — an LRU cache from third-party libraries.
• For high-performance cases with frequent reads and infrequent writes — sync.Map.

Example of a simple cache with sync.RWMutex:

Type Cache struct {
    mu sync.RWMutex
    data map[string]interface{}
}

func (c *Cache) Get(key string) (interface{}, bool) {
    c.mu.RLock()
    defer c.mu.RUnlock()
    val, ok := c.data[key]
    return val, ok
}

func (c *Cache) Set(key string, value interface{}) {
    c.mu.Lock()
    defer c.mu.Unlock()
    c.data[key] = value
}

This approach is simple and effective for most cases.