Tag: performance
Largest Contentful Paint (LCP)
A Core Web Vital that measures when the largest above-fold content element (typically the hero image or main heading) becomes visible — target under 2.5 seconds. The most impactful page speed metric.
2mo ago
performance intermediate
Latency vs Bandwidth
Latency is delay per request (physics + processing); bandwidth is throughput — high bandwidth does not fix high latency for small interactive responses.
3mo ago
networking intermediate
Lazy Loading Images
Deferring off-screen image downloads with loading="lazy" — improves initial page load and LCP by only fetching images as they approach the viewport.
3mo ago
frontend beginner
Lazy Objects (PHP 8.4)
PHP 8.4+
PHP 8.4 native lazy object proxies defer initialisation until first access — enabling zero-cost dependency injection of services that may never be used in a request.
3mo ago
php advanced
Linux Memory Management
How Linux allocates RAM — virtual memory, the page cache, swap, and the OOM killer — and what PHP developers need to know when PHP processes run out of memory.
3mo ago
linux intermediate
Linux Performance Tools
Essential tools for diagnosing CPU, memory, IO, and network performance on Linux — top, htop, vmstat, iostat, perf, strace, and ltrace.
3mo ago
linux intermediate
LLM Context Window
The maximum amount of text an LLM can process in one call — everything the model sees at once, including system prompt, conversation history, and retrieved context.
3mo ago
ai_ml intermediate
Load Balancing
PHP 5.0+ Distributing incoming requests across multiple servers to maximise throughput, minimise latency, and eliminate single points of failure.
3mo ago
devops intermediate
Load Testing
PHP 5.0+ Testing system behaviour under expected and peak load conditions to identify performance bottlenecks and breaking points before they affect users.
3mo ago
testing intermediate
LRU Cache
A fixed-size cache that evicts the Least Recently Used entry when full, implemented with a hash map and doubly linked list for O(1) get and put.
3mo ago
data_structures advanced
Lazy Loading
HTML5
Defer loading or initialising a resource until it is actually needed, reducing startup cost and memory usage.
3mo ago
performance beginner
Lazy Objects (PHP 8.4)
PHP 8.4+
PHP 8.4 native lazy objects defer object initialisation until first property access — previously requiring proxy libraries, now built into the engine via ReflectionClass.
php advanced