27794f95fd
rustdoc-search: optimize unifyFunctionTypes Final profile output: https://notriddle.com/rustdoc-html-demo-5/profile-4/index.html This PR contains three commits that improve performance of this hot inner loop: reduces the number of allocations, a fast path for the 1-element basic query case, and reconstructing the multi-element query case to use recursion instead of an explicit `backtracking` array. It also adds new test cases that I found while working on this. r? `@GuillaumeGomez`