SBCL Compiler Optimization: Speeding Up Compilation of (lambda () nil)
2024-12-28
The SBCL compiler received a significant optimization that dramatically improves the compilation speed of empty functions like `(lambda () nil)`. Previously, compilation generated many redundant functions. This optimization identifies and handles these special cases, directly returning a predefined empty function, thus avoiding unnecessary computation and significantly increasing compilation speed. This improvement is especially effective when dealing with large amounts of code containing empty functions, reducing compilation time and boosting developer productivity.