Which method can improve build times in Azure DevOps pipelines?

Optimizing build agents and implementing caching are effective methods for improving build times in Azure DevOps pipelines.

When you optimize build agents, you ensure that they are equipped with the necessary resources and are configured to handle builds efficiently. This could include using faster machines, configuring them for optimal performance, or scaling them appropriately based on the build demands.

Implementing caching, on the other hand, allows you to store previously compiled code or dependencies, which means that the pipeline does not have to re-fetch or rebuild everything from scratch each time a build is initiated. This significantly reduces the time taken for future builds since only the changed parts may need to be rebuilt.

This combination of an optimized build environment and strategic caching leads to faster and more efficient build processes, thus directly addressing the goal of reducing overall build times in Azure DevOps.