Firefox builds are now 17% faster through improved caching of WebIDL binding code generation. A recent change (Bug 2027655) enables buildcache's Lua plugin system to cache the Python code generation step that produces C++ binding code from WebIDL interface definitions. Since the output is deterministic, this eliminates redundant work on every rebuild.
Infrastructure
How to make Firefox builds 17% faster
Mozilla cuts Firefox build times 17% by caching deterministic WebIDL-to-C++ code generation via buildcache's Lua plugin system.
Monday, April 13, 2026 12:00 PM UTC2 MIN READSOURCE: LobstersBY sys://pipeline
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infrastructure