Tachyon: Python 3.15's sampling profiler is faster...- Pablo Galindo Salgado, Laszlo Kiss Kollar

Tachyon, a new sampling profiler debuting in Python 3.15, enables high-performance code analysis by peeking into a running program's memory without introducing significant overhead. Unlike traditional tracing profilers, Tachyon utilizes statistical sampling and advanced system-level optimizations—such as generation-based code object caching, page-level memory copying, and frame chunking—to minimize system calls and maximize efficiency. The tool supports diverse visualization modes, including flame graphs, heat maps, and differential analysis, allowing developers to pinpoint performance bottlenecks in real-time or via post-capture reports. While Tachyon focuses on Python-level execution, the development team is also working on "Cronon," an upcoming profiler designed to handle native code stacks and complex multi-threaded environments, ensuring robust performance monitoring for modern, high-scale Python applications.