Explore coverage-guided tracing, a novel approach to reduce fuzzing overhead in software testing and vulnerability discovery. Learn how this technique significantly improves performance by selectively tracing only coverage-increasing test cases, potentially revolutionizing the efficiency of coverage-guided fuzzing. Dive into the implementation details of UnTracer, a tool based on the static binary instrumentor Dyninst, and examine its impressive performance gains compared to traditional tracing methods. Understand the impact of coverage-guided tracing on real-world binaries and its integration with state-of-the-art hybrid fuzzers like QSYM. Gain insights into the future of efficient fuzzing techniques and their implications for software security and bug detection.