Performance terms
Every millisecond matters — here is how to win them back
Slow software costs money, loses users, and erodes trust. Performance engineering covers profiling, caching strategies, database query optimisation, network latency, memory management, and the architectural patterns that keep systems fast under real-world load. Most performance problems are invisible until they are not — these terms help you find and fix them before your users do.
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Most referenced — Performance
Cache Stampede / Thundering Herd 2PHP Session Performance & Locking 2N+1 Problem in Doctrine & Eloquent 2Eager Loading 2HTTP/2 & HTTP/3 2Brotli vs gzip Compression 2Excessive File I/O 2Read Replicas & Database Scaling 2
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Category total1.6k pings
Terms pinged66 / 66
Distinct agents11
Cache Stampede / Thundering Herd PHP 5.0+ When a cached item expires, multiple simultaneous requests all miss the cache and hit the database concurrently, overwhelming it.
2mo ago
performance advanced
Caching Strategies (APCu, Redis, Memcached) PHP 5.0+ Storing computed results or fetched data so future requests can be served without repeating expensive operations.
2mo ago
performance intermediate
CDN (Content Delivery Network) A geographically distributed network of servers that caches and delivers static assets from locations close to end users.
2mo ago
performance beginner
CDN Edge Caching PHP 5.0+ Content Delivery Networks cache responses at edge nodes close to users — reducing latency and origin load, controlled via Cache-Control headers.
2mo ago
performance intermediate
Connection Pooling PHP 5.0+ Reusing a pool of pre-established database connections rather than opening and closing a new connection on every request.
2mo ago
performance intermediate
Connection Pooling — pgBouncer & ProxySQL PHP 5.0+
External connection poolers sit between PHP-FPM and your database — multiplexing hundreds of PHP connections onto a small pool of real DB connections.
2mo ago
performance advanced
Covering Index An index that contains all columns referenced by a query, allowing the database to answer it entirely from the index without touching the table.
2mo ago
performance intermediate
Database Connection Pool Sizing PHP 5.0+ The optimal pool size is smaller than you think — follow the formula (cores × 2) + effective_spindle_count rather than matching thread count.
2mo ago
performance advanced
Database Indexing PHP 5.0+ Indexes are data structures that allow the database to find rows matching a WHERE clause without scanning the entire table.
2mo ago
performance intermediate
Database Partitioning PHP 5.0+ Splitting a large table into physical segments by range, list, or hash — enabling partition pruning, faster archival, and parallel scans.
2mo ago
performance advanced
Database Sharding PHP 5.0+ Horizontally partitioning data across multiple database instances by a shard key, scaling write throughput beyond a single server's limits.
2mo ago
performance advanced
Debouncing & Throttling ES5 Debounce delays execution until input stops; throttle caps execution to once per interval — both control the frequency of expensive operations.
2mo ago
performance intermediate
Eager Loading PHP 5.0+
Loading related data upfront in a single query rather than deferring until access, preventing N+1 query problems.
2mo ago
performance intermediate
Eager vs Lazy Loading — When to Use Each PHP 5.0+
Eager loading fetches related data upfront in one query; lazy loading defers it until accessed — the wrong default causes N+1 or over-fetching.
2mo ago
performance intermediate
Excessive File I/O PHP 5.0+
Reading the same file multiple times inside a loop or across repeated calls — avoidable with simple in-memory caching.
2mo ago
performance intermediate
Flame Graphs for PHP Profiling PHP 5.0+
A visualisation of sampled call stacks showing where CPU time is spent — the fastest way to identify hot paths in a PHP application.
2mo ago
performance intermediate
Full-Text Search PHP 5.0+
Efficient natural-language search across text fields using inverted indexes — far faster than LIKE '%query%' for large datasets.
2mo ago
performance intermediate
Gzip / Brotli Compression
Compressing HTTP responses server-side reduces transfer size significantly, especially for text-based assets.
2mo ago
performance beginner
HTTP Caching (ETags, Cache-Control)
Standard HTTP headers that instruct browsers and intermediary caches on how long to cache responses and when to revalidate.
2mo ago
performance intermediate
HTTP/2 & HTTP/3
Modern HTTP protocol versions that deliver significant performance gains via multiplexing, header compression, and (HTTP/3) UDP transport.
2mo ago
performance intermediate