Walter Bright did something similar in D's compiler (http://www.drdobbs.com/cpp/increasing-compiler-speed-by-over-75/240158941 http://www.drdobbs.com/cpp/increa

Walter Bright did something similar in D's compiler (http://www.drdobbs.com/cpp/increasing-compiler-speed-by-over-75/240158941 http://www.drdobbs.com/cpp/increasing-compiler-speed-by-over...) >DMD does memory allocation in a bit of a sneaky way. Since compilers are short-lived programs, and speed is of the essence, DMD just mallocs away, and never frees. This eliminates the scaffolding and complexity of figuring out who owns the memory and when it should be released. (It has the downside of consuming all the resources of your machine if the module being compiled is big enough.)