In 2025, a follow-up concurrency evaluation was conducted to compare six programming languages in AWS Lambda, revisiting a 2023 benchmark. The test involved implementing concurrent S3 object processing using language-specific idioms. Key changes included using private VPC connectivity to S3, leveraging S3 Express One Zone, and updating language runtimes. The evaluation revealed significant performance improvements across all languages, particularly at lower memory configurations. Architectural changes eliminated the S3 warmup effect, providing consistent latency from the first request. Java’s virtual threads stood out as a major performance enhancer. While S3 Express One Zone showed no measurable advantage in this workload, all languages now run successfully at 128MB with smooth scaling curves. The study also examined the relationship between code complexity and performance, offering insights into language selection for serverless applications.