Signals vs Query-Based Compilers

Query-based compilers and Signals share similar architectural concepts but differ in execution strategy. Modern compilers use a query-driven architecture where everything is composed of queries and inputs, processing only what's necessary to answer specific questions (like autocomplete or type checking). Unlike Signals which push changes through a system for instant UI updates, query-based compilers are demand-driven and use revision counters to ensure correctness without maintaining bidirectional dependencies. This approach reduces memory consumption and enables aggressive parallelization, making it ideal for interactive development tools like LSPs.