Veteran Microsoft engineer says original Task Manager was only 80KB so it could run smoothly on 90s computers — original utility used a smart technique to determine whether it was the only running instance

Dave Plummer, the engineer behind many of Windows iconic features like ZIP file support, shared how he built the Task Manager to be so efficient. According to his YouTube video, the current Windows Task Manager is about 4MB, but the original version that he built was just 80K. Plummer’s main concern when he built the Windows utility was that hardware during that time was so limited, and that the tool that was used to recover the PC after everything had failed still needs to feel crisp and responsive, even if everything else had hung.

“Every line has a cost; every allocation can leave footprints. Every dependency is a roommate that eats your food and never pays rent,” said Plummer. “And so, when I ended up writing Task Manager, I didn’t approach it like a modern utility where you start with a framework, add nine layers of comfort, six layers of futureproofing, and then act surprised when the thing eats 800MBs and a motivational speech to display just a few numbers.”

One…