Ionify Explores Virtual Compiler Inputs to Avoid Full Tailwind Rescans

Ionify, an open-source frontend build tool, previously faced a Tailwind performance regression in which changing classes triggered a full rescan, raising build times from about 300ms to 1.3s in one workload. A first optimization cut the overhead by roughly 40 to 50 percent, prompting the developer to ask whether the unnecessary rescan could be eliminated entirely. Ionify's AI coding assistant advised a conservative approach, since changes can affect other inputs through dependencies, so scanning only the modified file is not automatically correct. The developer instead explored building a Virtual Input from the artifacts Tailwind's compiler needs, invalidating it only when correctness-relevant dependencies change. The work remains conceptual, with no guarantee that unrelated dependency changes can always be ignored.