DMD is heap profiler built into Firefox, best known for being the tool used to  diagnose the sources of “heap-unclassified” memory in about:memory. It’s been unusable on Win32 for a long time due to incredibly slow start-up times. And recently it became very slow on Mac due to a performance regression in libunwind. Fortunately I … Continue reading DMD is usable again on all Tier 1 platforms