PostgreSQL Was Not Slow. Our Index Was Useless.
Learn why a PostgreSQL index can still be useless and how composite indexes, EXPLAIN ANALYZE, and query patterns improve reporting speed.
Async Was Slower Than Sync in This Spring Boot Load Test
A Spring Boot load test where async handled requests slower than sync. Compare latency, throughput, and thread behavior.
Async Was Slower Than Sync in This Spring Boot Load Test Read More »
Redis Cache Expiration Causes Hidden Latency Spikes
See how Redis changed Spring Boot API latency, throughput, and P95 response time in a practical cache benchmark.
Redis Cache Expiration Causes Hidden Latency Spikes Read More »
Redis Made This Spring Boot API 30x Faster in a Load Test
Tested Redis caching in a Spring Boot API and achieved up to 30x faster response times. See benchmarks, P95 impact, and key insights.
Redis Made This Spring Boot API 30x Faster in a Load Test Read More »
API Slow? Database Fine — Real Performance Case Study
Spring Boot API latency investigation showing slow responses despite fast PostgreSQL queries, with real metrics and optimization insights.
API Slow? Database Fine — Real Performance Case Study Read More »
Microservices vs Monolith Performance: Latency Trade-offs We Measured
Exploring performance trade-offs between microservices and monolith architectures, including network latency, and complexity.
Microservices vs Monolith Performance: Latency Trade-offs We Measured Read More »
Spring Boot Saturation Test: Why 300 Users Caused 42% Failures
Load testing Spring Boot defaults at 300 concurrent users reveals connection pool saturation and 42% request failures.
Spring Boot Saturation Test: Why 300 Users Caused 42% Failures Read More »
Spring Boot Redis Benchmark: When Caching Made Latency Worse
Benchmarking Redis caching with 100 users on 10M rows. Proper config improved 15× — bad config caused unstable latency.
Spring Boot Redis Benchmark: When Caching Made Latency Worse Read More »
Kafka Lag vs PostgreSQL Writes: What Slowed the Consumer Down
Real Kafka lag benchmark with payload growth and PostgreSQL indexing impact. Measured drain time and throughput.
Kafka Lag vs PostgreSQL Writes: What Slowed the Consumer Down Read More »
JPA vs JDBC Performance — 10M Rows (PostgreSQL)
Real Spring Boot benchmarks compare JPA and JDBC on PostgreSQL with 10 million rows, showing why ORM overhead explodes at scale.