$ ls -la /posts
total: 5 (tag #performance)
$ open windows.mode
SQL Execution Priority and Performance Optimization
How PostgreSQL executes queries internally and how to systematically diagnose and fix slow SQL in production systems
#postgresql#sql#performance
Array vs Hash Map Lookup — What Really Wins in Performance?
Why array index lookup often beats hash map lookup in practice, even though both are O(1). Understanding constant factors, CPU cache, and real-world performance.
#data-structures#performance#algorithms
How the Java Virtual Machine Works
A system walkthrough of JVM internals, from bytecode loading to garbage collection and runtime optimization.
#java#jvm#runtime
Why We Need So Many Caching Layers
Understanding why modern systems require multiple levels of caching—from CPU caches to CDNs—and how they form a speed pyramid.
#caching#operating-systems#performance
How Modern Web Browsers Render Pages? - Part 1
This first part explain how your website is found over the Internet
#browsers#dns#web