Even on modern, high-powered computers, using a low-CPU plugin means you can run dozens of instances without issues.
Alternative: If you can’t find Purity, consider (Air Music Tech) or SampleTank 4 (IK Multimedia) – both are modern romplers with similar instant-hit appeal.
Optimized for extreme efficiency; it can handle up to 1,024-voice polyphony without straining modern (and even older) CPUs.