Optimizing existing large codebase Measuare Mem threads low Outline Measuring Performance The nightmare of thread safety o What is performance Context and constraints Tools available o ldentifying problems Finding bottlenecks ●Solving problems ②Code modernization oThread contention Improving Memory Handling Low level optimizations ●Context Scope and target o Containers and memory o How to measure o Container reservation Improving Detecting offending code 6 Conclusion 2/57 S.Ponce-CERNOptimizing existing large codebase 2 / 57 S. Ponce - CERN Measure Modernize Mem threads low level c/c Outline 1 Measuring Performance What is performance ? Tools available Finding bottlenecks 2 Code modernization 3 Improving Memory Handling Context Containers and memory Container reservation Detecting offending code 4 The nightmare of thread safety Context and constraints Identifying problems Solving problems Thread contention 5 Low level optimizations Scope and target How to measure ? Improving 6 Conclusion