Software-Performance

How Modern Hardware Shapes Software Performance Modern computers combine many parts that influence performance. Software speed comes not only from raw CPU power but from how well code uses memory, caches, and parallel execution. The same program can be fast on one machine and slow on another because hardware differences matter. To write efficient software, consider the hardware from the core up to the storage stack, and design with data movement in mind. ...

Building with Hardware: How Architecture Shapes Software Performance Software runs on machines with many moving parts. The way hardware is built—speed, memory layout, and how many tasks it can juggle—shapes every performance choice a developer makes. Designing with hardware in mind helps you avoid bottlenecks early and makes scaling smoother. At the core, CPUs and their caches decide how fast code can work. The fastest instruction matters less than how often your data stays nearby. If your data is laid out to be read in a predictable, consecutive stream, the processor can fetch it efficiently and keep the pipeline busy. Modern CPUs have multiple cache levels—L1, L2, and sometimes L3. Data that fits in L1 is blazing fast; larger working sets spill to slower levels, which matters for large programs. ...