JIT: So you want to be faster than an interpreter on modern CPUs

The article discusses the challenges of beating interpreters on modern CPUs with JIT compilers, focusing on PostgreSQL performance improvements. It delves into the complexities of out-of-order execution and super-scalar CPUs, highlighting the impact on interpreters. The author explores optimizations like inlining and reducing null checks in PostgreSQL's int4eq function, showcasing performance gains. Despite the advancements, the article questions the effectiveness of JIT compilers against well-optimized interpreters due to the efficiency of modern CPUs. The author seeks help and contributions for further development and optimization of the JIT compiler.