Not all performance problems have obvious "bottlenecks", some are entirely second-order effects.
For instance, everyone tells you not to optimize CPU time outside of hotspots, but with memory usage even a brief peak of memory usage in cold code is really bad for system performance because it'll kick everything else out of memory.
For instance, everyone tells you not to optimize CPU time outside of hotspots, but with memory usage even a brief peak of memory usage in cold code is really bad for system performance because it'll kick everything else out of memory.