laravel:performance-caching

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• SKILL.md

SKILL.md (first lines)

# Caching Basics

## Framework caches

```
php artisan route:cache
php artisan config:cache
php artisan view:cache
```

Clear with the corresponding `clear` commands when needed in deployments.

## Values and queries

```php
Cache::remember("post:{$id}", 600, fn () => Post::findOrFail($id));
```

- Choose TTLs based on freshness requirements
- Invalidate explicitly on writes when correctness matters

## Patterns and Strategies

```php
// Stable keys and scopes (e.g., tenant, locale)
Cache::remember("tenant:{$tenantId}:users:index:page:1", now()->addMinutes(5), function () {
    return User::with('team')->paginate(50);
});

// Tags (supported drivers) for grouped invalidation
Cache::tags(['users'])->remember('users.index.page.1', now()->addMinutes(5), fn () => ...);
Cache::tags(['users'])->flush();

// Locks to ensure exclusive expensive work
Cache::lock('reports:daily', 30)->block(5, function () {
    generateReports();
});
```

- Use stable, namespaced keys; include any scoping dimension
- Prefer `remember()` to prevent thundering herds
- Use cache tags (if supported) to invalidate related entries together
- Avoid caching highly dynamic or user-specific data without a plan
- Document invalidation triggers next to cached code

## Laravel 13+

```php
// Extend TTL without re-fetching/re-storing the value
Cache::touch('user_session:123', 3600);
Cache::touch('analytics_data', now()->addHours(6));

// Filesystem-backed "storage" cache driver (e.g., S3 as a K/V store)
// config/cache.php
'storage' => [
    'driver' => 'storage',
    'disk' => env('CACHE_STORAGE_DISK', 's3'),
    'path' => env('CACHE_STORAGE_PATH', 'framework/cache/data'),
],
```

- Security default: `serializable_classes` is `false` in `config/cache.php`; allow-list classes you cache as objects
- Default cache/Redis prefixes changed underscores → hyphens in 13.x; pin `CACHE_PREFIX`/`REDIS_PREFIX` explicitly to avoid cold caches on upgrade

From jpcaparas/superpowers-laravel, MIT.

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