Microsoft's 90s Weapon That Made Windows Fast [video]
This video explores a key internal strategy Microsoft used in the 1990s to make Windows perform quickly on consumer hardware, highlighting a specific optimization or development approach from that era.
Background
- This video explores a little-known Microsoft technology from the 1990s called the Windows Hardware Abstraction Layer (HAL) and related kernel optimizations that made Windows NT (the foundation of modern Windows) competitive with Unix systems in speed and stability.
- The "weapon" refers to Microsoft's aggressive, low-level engineering tactics: they hired elite developers (like David Cutler, who designed VMS) and built a microkernel-based architecture with hardware abstraction, allowing Windows to run on multiple processor architectures (x86, MIPS, Alpha, PowerPC) and scale from desktops to servers.
- Context: In the early 90s, Windows 3.1/95 were consumer OSes built on MS-DOS, unstable and prone to crashes. Windows NT (1993) was Microsoft's bet on a professional, high-performance OS to challenge Unix in enterprise and compete with IBM OS/2.
- The HAL's design let NT run ring-0 code efficiently, bypassing slow emulation layers, and gave it preemptive multitasking, memory protection, and symmetric multiprocessing — features that made it "fast" for the era and paved the way for Windows 2000, XP, and all subsequent NT-based Windows versions.